OOC note, first and foremost: Erin Katayama is a character of mine who while yes, I publicise and sensationalise the suffering of immensely, is designed to be a controversial character in many respects, the foremost of which being the fact that Erin is not a mental-health success story, a fact I hold near and dear to myself and her both. Many mental illnesses are not accurately RP'd out on this server, yes, an overabundant issue, but the most prevalent one I do not see acknowledged enough is that things don't always all get better for everyone.
Erin is not only representation for these individuals who never recover from their illnesses, who never beat it, but also an ode to the world in which I myself did not get better. I ask this fact remain in mind as you read throughout this biography.
Another note; This biography is atypical in many rights, firstly, it is not pretty. It is cold, colourless, and bland. It is designed from the perspective of a researcher (myself) studying Erin as she evolves and documenting her life and her relationships. Within this perspective, she is not a person, but a datapoint. As I tell Erin's stories through her relationships, rather than telling you my idealised version of her, you will learn about her through the lens of her relationships, her interactions, and how the events she shared with them influenced her life and development both. This is an enormous labour of love that has been worked on since I created Erin. It involves actively recounting many specific details of her numerous relationships and is subject to update and should be regarded as incomplete until further notice.
If you ask me "Where is xyz" I will add them if there is something to add, don't test me.
I have left out the family section as it is all TBA as of current.
CASE REPORT
Subject of Study:
Erin is a woman of mixed Chinese and Japanese descent, her build is scrawny and underweight, though she has some muscle, primarily within her legs. A couple of small scars adorn her neck as well as a cigarette burn at the collarbone. Numerous scars are littered across her abdomen and lower back, varied in size. Erin has long black hair with deep purple highlights streaking throughout.
Scars and Other Defining Features
Below her right eye there is a small, thin, and an almost perfectly vertical cut, about an inch long, ever so slightly offset inwards towards her nose. There is a small horizontal scar barely visible on the left side of her throat. Her right shoulder blade and both collarbones are pockmarked with small puncture wounds, though the right collarbone bears a cigarette burn the left does not. The front of her chest is adorned with numerous small lacerations. Right along the crease between her left arm and chest there is an enormous stab wound. Moving down to her left abdomen “FAKE HELPER” is carved into her, accompanied by three stab wounds, one larger and two are smaller, clearly from two different types of blade. There is a medium sized stab wound in her right abdomen. “Sorry not sorry, Angel” was carved into the inner part of her left forearm. Numerous regular lacerations in varying sizes and forms mark her inner left forearm. Seven off-set laceration scars mark the right wrist in specific, shaped similarly to an M that was clawed out. Further up the arm there is a large stab wound scar with the profile of a katana, with a second even larger one beside it, closer to her body, and a large slash mark across the outside. There is a ‘C’ shaped scar on the back of her right hand, while her right wrist has a large rectangular burn pattern going across the width of it. Her left thigh has a large stab scar on it, as well as the back of her left knee has an incredibly large scar across it.
Daily Carry Items
Her trusty baseball bat rarely, if ever, leaves her side. She also never leaves home without her plushie shrimp, Shrimpy, which usually adorns the top of her head! Erin carries her own ID Card as well, usually tucked in the bottom of her schoolbag with an autograph from Yokota Tsukumo. Aside from this, she carries around a modified school bag, which is lined with Mylar insulation to keep its contents cool 24/7. Within this bag she always carries sports jellies or “Energy Jellies” for electrolytes when people are injured or dehydrated, alongside it she carries water bottles, an ice-pack, numerous packets of paracetamol, her own medications, and her taped together, bloodstained, Beach Red Medkit.
Threatening Ms. Katayama is not a successful means to an end, her regard for the self remains theoretical at best. That being said, recent studies show this is also true of her loved ones, unintentionally, that is. No matter how you interact, if it is beyond passing pleasantries, caution is recommended to be exercised. It is suspected that there do exist methods of earning her compliance and friendship though, which are unknown to our studies, they seem to be only accessible to certain demographics of women.
Of those people, the following stand out as role models to Ms. Katayama:
Role Models:
Miyako Sakai
Detective Sakai, quite possibly the closest thing Erin has had to a mother during her life in Karakura. Erin’s first memorable encounter with Miyako was during an otherwise unremarkable foot patrol in which she accompanied another officer, the closest thing she has had to a dad, Sinner Volkonsky. Erin doesn’t particularly remember this trip too well, just that Miyako was very relaxed with her being there, asking no questions. Erin would regularly encounter Miyako as she made her way through Karakura, particularly as she visited KPD, as she often did, regularly offering them homemade food. The next moment Erin had with Miyako was during her thirty-third milestone when she limped into KPD having just fought her then nemesis Jeon Sang, barely clinging to consciousness. Miyako would go on to take Erin to the hospital expeditiously, even waiting for her to finish treatment. Erin eventually gained Miyako’s number, which she would use to periodically reach out, oftentimes for small bits of advice or help. Her relationship with Miyako would eventually evolve following her thirty-eighth milestone when she managed to convince Jeon to confess to his crimes in exchange for clemency from Erin, in which Erin selected Miyako to be the one to process the confession and arrest, which she did. After which, Erin thanked her profusely and even cried in her arms as she gave Miyako her thanks. Since then, Miyako has been someone Erin has sought guidance from on numerous occasions, though Miyako and Erin’s closest moment thus far was their heart to heart. Erin’s forty-seventh milestone, a conversation important enough it had Erin beginning to implement radical changes, with a dedicated return to therapy and an honest to Kami intention of recusing herself from the thug life. Only one of those changes would stick, however. A psychotic break would change this all for Erin. How Miyako will react or if she will learn remains unknown, though the burden of guilt seems to weigh heavily on Erin’s conscience. Following Erin’s discharge from hospital during her fifty-second milestone where she was tortured to death, she managed to speak with Sinner and Miyako together. While Miyako was less immediately forgiving of the circumstances that placed Erin in such a position than Sinner, she still managed to give Erin what she needed in that moment from her, which was her support. As she did for Sinner, she sobbed in her arms too, apologising and pleading the truest, sincerest vow against violence she could, one largely upheld to this day. Their time was unfortunately cut short by what Erin could only surmise was a fellow KPD being stabbed, however, though Erin still received the validation she so desperately needed from her.
Sinner Volkonsky
Sinner, met during Erin’s nineteenth milestone, where she walked into KPD for a trivial reason not even she remembers. She met Ares, the very recently made ex of Shiro Nataka, having recently fought with him, though based on the shape of Ares it was more of a beatdown than a fair fight. At this time, Erin had zero respect for the police, actively harassing them when she saw them oftentimes yelling “I smell bacon, I smell grease, I smell the Karakura police” and engaging in other similar acts of disrespect. Though Sinner would change that, affectionately referred to by Ares as 686, his badge number. Erin would take to calling him this as well, not wanting to seem too friendly with the cop at first. Though, seeing how he treated Ares, as insolent as the child was, spoke to her in a way that she hadn’t thought possible. She respected him. She would once bring him food, as a thanks for how he treated Ares, a gesture of respect. This turned into Erin occasionally bringing him food, homemade by herself as always, as a means by which to socialise with him. Sinner would quickly turn into Erin’s go to cop, regularly texting him with her issues, rather than going to KPD since the rest were still unknown variables to her. He was the good one to her, though her trust would expand rapidly after her twenty-sixth milestone, where she fought with Miyako “Maki” Mayumi, her former gang member, after she was bitten by a bear. Erin had attempted to treat Maki’s injuries since she refused to go to hospital and wound up with a severe concussion, several stab wounds, and a slash or two. She was left bleeding out slumped against the wall in her home, where the first and only call she made was directly to Sinner. Sinner himself being unable to leave the station due to regulation, swiftly sent his partner, Osaki Mori, to Erin’s aid and was readily there at her bedside by the time she exited treatment. This could be regarded as the first true moment where Erin reconsidered her stance on the police entirety, while Osaki is a lawyer, she learned that Sinner kept good company, and felt wrong to judge them all by her preconceived notions of law enforcement, and from this moment, Erin would start to attach to Sinner in the way that Ares had. A sort of protective figure, not quite viewing him in the fatherly capacity she would come to, but this would be a foundational moment to that. While they stayed in thorough contact, their next big moment wouldn’t be until Erin’s fifty-second milestone, had come and gone. Though, she had her doctors text him when she was first hospitalised, him, Miyako, and Tsukiko. With her fifty-fifth milestone, the conversation she had with him itself was much more serious. She vaguely confessed her sins to him, and his voice had layers of disappointment baked into it, but his words were still every bit as supportive as Erin needed. Erin went so far as to say some words seldom said, that she loves him. She relayed the same vow she made herself to him, one to stay away from violence, which was greeted as well as she wanted. ‘As long as you swear to keep yourself out of harm’s way from now on, there’s no reason for us to ever be disappointed in you ’
Kaida Yukitomo
Kaida had been a repository of wisdom for Erin and having been something of a mother figure to the Katayama’s, at least her and Roo in the early days of her time in Karakura. Particularly so with her having been there for her first memories in Karakura. Erin’s first memory and subsequently her first milestone in Karakura as a kid was that of witnessing three instances of major assault on her family, to which Kaida came to the aid of, delivering the three to the hospital and offering Erin comfort and a lifeline to reach out to in the event her family’s antics became too much, which they soon would in Erin’s second milestone. Kaida came to her aid this night as well, where Erin was kidnapped by Jeon K Sang after watching a fight outside of the then Speakeasy with her Auntie Roo, wherein she was threatened to be stabbed and cut by him before he stole her. As Roo fought Jeon, she called Kaida who came to kick ass and drag both of the Katayama women out, handling him with ease before escorting Erin and Roo to her home where a discussion ensued and wound up with Erin living with Kaida for a month due to feeling unsafe living with Roo and a feeling of general anger with her for refusing to listen to her. During Erin’s fifth and sixth milestones wherein she decided to join a gang, more specifically, join Asuna in the Parabellum Bratstvo, she consulted with many of her family, though she discussed the most with Kaida, sitting for hours listening to her warnings and something that could be described as a cautionary tale. She strictly told her not to join Sinnerous, despite an offering from a close-ish friend, Kaida encouraged her to pick the option where family is present to protect her. Her eleventh milestone happened the night Roo went missing and wound up being cut and stabbed by Jeon while Kaida was forced to watch. She scoured the city coordinating with Uncle Tobi to find her, she didn’t succeed but she managed to find Jeon K Sang with Shiro Nataka in powerplant, eerily close to when Kaida reported finding Roo. Following her treatment, a discussion between the family transpired, Erin announced she was leaving Parabellum and proclaimed Kaida to be, in her eyes, the closest thing the family has to a mom due to her protective nature over the Katayama’s. Erin’s thirteenth milestone was following a series of unfortunate events that led to her reflecting on her life choices in the wake of Angel walking out for the second time, she asked for Kaida’s assistance in staying sober and on what she could do to improve her life’s course, and she took the advice she was given and ran with it, making amends with those she could, asking everyone she can to not sell her liquor, and ultimately meeting with a counselor to discuss her educational future at the suggestion of Kaida. After a prolonged period of absence in Erin’s life, Kaida returns for Erin’s fifty-fourth milestone, quite conveniently. As Erin is dropped off at Koribureku by Vahalo , following her release from her extended hospital stay earlier that day, she runs into Kaida outside who offers to chat with her. Erin, in the most emotionally vulnerable state she’s ever been in her life, happily accepts her comfort. Dumping everything that’s happened, everything that’s led her to this point. The torture of one of her closest friends, the torture of her mentor, her own torture. She sobbed in Kaida’s arms as she was reassured over and over again, this being her first ounce of comfort since her wedding day. They finish off the night, with what seems to be a return to form, Kaida as a shoulder to rely and cry upon for Erin.
Vahalo Kakōs-Hattori
Someone who served as a mentor to Erin for quite some time. Vahalo was the only nurse consistently present within the nurses office of KHSCC for the longest time, and back then, Erin was able to weasel her way into the nurses office as an unofficial volunteer. She spent months of her life here, triaging and treating wounds of her fellow classmates fastidiously. She kept excellent charts and often made Vahalo’s day easier. When it comes for Erin’s ability to take care of others, the training and practice she did here was foundational and Vahalo’s importance to this is to never be understated. It was during Erin’s twenty-fifth milestone that she found an affinity for volunteer nursing. This started with her friend, Ava, who had drunk a near lethal amount of coffee and Erin wound up hanging out in the nurses office all day while she waited for the caffeine to clear Ava’s system. Erin had always had a love for helping people, but Vahalo truly facilitated it. Whether he wanted less work for himself or what, not so known, but it was quintessential to her development. The pinnacle of this story arc however comes in Erin’s forty-eighth and fiftieth milestones in which she sought retribution on her then friend, William ‘Anderson’, for torturing him. 'Retribution' as it were, was exacted but not without a heavier price for Erin. The retaliation for this transgression would yield a sum result of Erin 'dying' for Vahalo in a way.
Romantic Endeavours
Angel Yamashita
The progenitor of modern day Erin. Having met her after Erin had an argument with her friend, Angel’s aunt, Rikka during her eighth milestone. Angel sought Erin out following this, where she took advantage of Erin's lack of better judgment and overwhelming susceptibility to intimidating women. Taking her off to a cave for a coffee date, which was a pretty weird pick, even weirder was taking her off to the beach to sleep with her the night they met. Angel was unique, interesting, and most importantly to Erin, insanely hot, extra insane, extra hot. Angel was the type of person to treat those around her like toys, pets, and Erin was no exception, regularly referred to as pet instead of her name for a large part of their involvement together. She embraced this attention without protest, unwilling to deprive herself of Angel's presence by resisting. Erin was molded by Angel, shaped by her presence into the shell of a woman she is today. Angel left Erin alone a lot, regularly walking out on her, never intending to come back and in spite of her horrific animalistic treatment of Erin, she consistently begged Angel back. When begging failed, she acted out, because she always had to come back to clean up her ‘pets’ mess, at least… until she didn't, which would mark Erin’s fourteenth milestone, Angel’s departure. While she was often cruel to Erin, before those were moments of tenderness, just as she would retreat back to her sectioned off self. One of her final notes to Erin before her disappearance regarded her as being her heart. The excerpt reads as follows:
“...I don’t like my heart. It’s too soft for a city like Karakura, which is why I keep it aside.
You are my heart Erin and I will leave you be and pretend you don’t exist…”
Niny Sumisu
Niny was someone who was never meant to be as near or dear to Erin’s heart as she is, which makes the story of her not too dissimilar from those Erin holds close. You never plan love. Erin never got to that stage even, not until long after the doors on that chapter of her life had closed. Long before Niny had ever learned of Erin’s woes or even knew her name, Erin had undertaken efforts to presumably save her life, ironic considering how their last interaction had gone. During Erin’s twenty-fourth milestone she was informed by a friend, Inosuke Saeku, that a woman whose name she’d only heard in passing, Niny, was kidnapped. Now, Erin never succeeded in finding her but it was the first time in Erin’s story where she truly rallied the people around her into a coordinated effort, organising a solid group of people to look for this woman. It felt good, arguably one of the first times in Karakura where Erin felt a sense of personal pride. Intentionally or not, Niny was someone now important to Erin. Many months passed after this, Niny and that event becoming something referred to only in passing or whilst reminiscing with friends who helped her look. No, it was not until Erin’s fifty-ninth milestone that Niny appeared once more. A few weeks had passed since Erin’s Date of Death and she finally mustered up the courage to leave her apartment for the first time. It was there she ran into Niny once more. They conversed, briefly, before returning to Erin’s apartment for what can only be considered beyond trauma-dumping, trauma-landfilling, perhaps? She spilled every detail of what had been done unto Vahalo, how she exacted her retribution, how she roped Akane into it all. She described the horrors inflicted upon her with even more detail, weeks had passed since it had happened and Erin had no comfort, no reassurance, no hand to hold until this moment. Not even her wife, which is something Erin remained very bitter about. For the first time since her passing, she no longer felt alone. Erin would never admit this to anyone other than Niny, not in such bold words at least, but Erin credits Niny with having done nothing short of saving her life that night. Every ounce of comfort offered to her in that dark moment? Savoured. Cherished. Clung to. The way she feels for her is something of a mystery to Erin this day, but to call the feelings toward her as a desperate love would not be inaccurate. Niny may have left like the others, but Erin views her no differently over this, if anything her coming in her darkest hour was a sign. Erin had a guardian angel.
Digital forensics have yielded an account in Erin's name in which we suspect prose posted to it regards Niny, an excerpt is listed below;
"How do I tell her [Erin's the******] that your presence felt like rainfall on a droughted lake...
...The broken clock is already right twice a day, more often than most people,
but springs to life when powered. You are that energy, that drive,
the one who makes every moment right..."
Lucy V. Evergarden
TBA
Friends
Akane Stark-Kuznetsova
Erin met Akane just before discovering William had betrayed her trust and her faith in her by torturing Vahalo. She knew Akane was related to Vahalo, and she knew his torture was personal to her by the way she conducted herself, paraphrasing "DID YOU FIND HIM TORTURED? NO, SO GET IN LINE" is what she said. After the identities were confirmed she spent a few days seeking Akane out through varied means before finally securing her number and establishing contact. Their first true face to face was... abrasive. Such was business with Akane, but Erin was used to much worse than abrasiveness, allowing for Akane to let out her frustrations toward Erin without issue. She invited her to torture William, who had agreed to receive twice the punishment in exchange for confirming the identities of both of the accomplices. Akane would soon join her in the chilled depths of the cave at what remains of the Saiky Estate on the Itsbyoshi trail. Following the first day of torture, Erin would accompany Akane home after classes, where news regarding a text and the torture would send Akane into a spiral, which resulted in her room and phone being destroyed, these damages being exacerbated by Erin's persistence. Additionally, Erin sustained a bat wound to the head and a minor concussion. Regardless, as Akane fled the apartment, Erin would pursue her around the city relentlessly trying to return her to home, eventually succeeding. Following their return to her home, Erin would fully repair and clean the damages Akane left as part of her understanding. She knew, not in full but she knew, how stressful of a time this must be for Akane, and despite how much of a pain in the ass she is to her, Erin still wanted to do what she could to make things easier.
Soren St-Yves
A rather unappreciated and under-sung voice in Erin's life, Soren. Present from early on in the days of Angel. At the time, Soren was Erin's insight into Angel, much to the dismay of Soren though, an adamant advocate for safety within those whom Erin dated and found attraction towards. Soren is a unique exception to Erin's story, not playing a major role in many of her milestones, she finds herself even under-represented in our data, though this can be attributed to Erin's suspected unwillingness to maintain healthy relationships. In spite of the efforts of Erin, and those unhealthy relationships, Soren tries valiantly to insert herself as the sole support system within Erin's life, entirely without success. In a surprising twist, despite turning away her help at every turn, Erin has held Soren in high regards and as a close personal friend. A fact which has not been expressed to Soren whatsoever, nevertheless, she persists.
Yurii Akiyama
TBA
Nayeon Baek
TBA
Marigold Volkova
TBA
Inosuke Saeku
TBA
Xara Zindel
TBA
Sumake Tendo
Quite possibly one of the most unique mentions that Erin would regard as a friend is the schools head chef, Ms. Tendo, the only non-student to make Erin's list of identified friends. Erin mentioned Tendo early on in her private journaling as 'the coolest chef ever' and 'Shrimpy's second biggest fan.' We weren't sure what to make of this one. Though, further notes do mention her to have been over to Erin's home and making some delicious baked goods as part of an apology to a tutor who's day Erin had credited herself with ruining, with a selfie of the two in her kitchen alongside it. Since then, mentions are sparse other than a small message from when Erin returned to Karakura about how she was happy to see she still worked there and a note in parenthesis about potentially playing Helldivers 2 together. . . We weren't sure what to make of this one either.
Shock
The single-most saddening entry found during our study. Rather than attempting to contextualise this incredibly abstract relationship within our research scopes, for the purposes of clarity, the team has elected to include Erin's journal entries regarding shock into the paper. They are as follows.
23 June 2025 - Voice memorandum, archived, transcription provided below:
"They told me I died, said something about the time, I'm lucky to be alive- Whatever... I don't even remember it. I refuse to even speak to the hospital staff, the only reason I am even recording this is because I can't use my fucking hands. What I do remember was pain, a lot of pain and then something just clicked, like being dunked into an ice bath, or so I imagine. It wasn't cold, not at first, but the sensation hit like that cold snap. Slowly everything started to feel duller, like a thick blanket wrapped around each and every nerve. I leaned into it, or at least I tried to as much as I could. Then and only then did things start to get cold, particularly around where they'd hurt me, stabbed me. It radiated inwards as a cool sensation poured over my skin, what I assume was my blood, but this I paid no mind to. Everything was engulfed by the blanket and the chilliness became a greater distraction than the pain was a stimulus. In that moment, it was my only friend and I loved this friend dearly, almost as much as life itself."
1 March 2026 - Text memorandum, drafted to her digital journal but not published:
"I met with an old friend recently, it wasn't pleasant by any means, but it was welcomed. A couple times now. First was for 13 stab wounds. 11 to my abdomen, 1 to my chest, last one to my neck. We barely touched hands before someone found me and whisked me off and I was unconscious and loaded on painkillers. It wasn't until a few days later we met again, some 30 odd to my back. Like pin-pricks coated ice-water before I was carted to hospital. I barely remember its touch that day, but it was comforting. I miss it."
22 March 2026 - Text memorandum, drafted to her digital journal but not published:
"I got what I wanted. I don't think God quite understood me when I said I miss it. That didn't mean I wanted to meet it again. This one was bad, katana. Through and through, I remember instantly keeling over. Before I even hit the ground that same cold-snap hit as I landed on the ground, a chilled 'puddle' creeped around my abdomen as I crawled out of the cave. I called 110 and then blacked out. Woke up post-op being told KPD needed to speak to me and I was gonna be in recovery for a few days, nothing new. Nothing could have prepared me for who walked through those doors though. Miyako. The look on her face made me regret ever missing it. I'm sorry Mom."
Enemies
William 'Anderson'
TBA
Jeon K. Sang
TBA
PARASOCIAL ENCOUNTERS
Min-ji Aeun
Someone who would be less than thrilled to know she’d found their way onto this list, though for now Erin can only dream, delusionally, that these feelings are returned. A woman of many comforts and many injuries to Erin, someone who by all means should not be listed but is. Shortly following Erin’s identity change, she found herself associated with Min-ji marking her sixty-seventh milestone at a time where many were cruel to her and Min-ji was no exception, not in that regard, but she found herself setting an example otherwise. A cruelty marked by warmth, something that kept Erin coming back. Their moments of sincerity were precisely that; sincere. Genuine. At a time where warmth and kindness both were at a premium, Min-ji became the least bad option by a mile, even coming to be the first and only person who knows Erin runs the 555 Fan account. An altercation happened one night as Erin found love within another who has since departed Karakura. Min-ji had kept her ‘order’ to Erin simple. Learn that she was the best Erin was ever going to get or don’t come back. Time passed and with it changes came. Erin left too and returned to Karakura without resolving this conflict. Shortly upon returning she found herself before Min-ji again, a substantially changed woman, all for the worse unfortunately. All she had found between there and here were infinitely crueler people, the memories of which she once sought comfort with turned soured by new experiences and Min-ji ’s words rang truer than ever before. In her eighty-fifth milestone, Erin reunited with her fully, coming back to her side and remaining there throughout her eighty-ninth milestone in which Min-ji turned cold towards Erin, for a period. Her once retaliatory attitude towards Erin’s transgressions became a proactive one and following repeated misgivings which only served to hurt Min-ji, she reciprocated that suffering. With this, they remain in an unstable matrix of mutual co-existence with Erin relying heavily on her presence for support, hoping for a happier future with her.
Yokota Tsukumo
Yokota happened to catch Erin’s attention in a rather unique way, and by that we do mean Erin has created an Onrain account dedicated to the stalking, or in her words ‘appreciation of’, Yōkota. To most, Yōkota is regarded as mean, an "opp", or to former allied gang members of Erin, a potential stabbing victim. Even considering this is something Erin regrets deeply but refuses to even acknowledge having participated in. Despite a pronounced lack of success, she still works to repress the memory of attempting to hospitalise her idol all the same. Erin’s fixation with her was initially superficial, being a 7 foot tall woman with a uniform and a weapon she was a natural subject for a person such as Erin to fixate on. Though her asking something of Erin, assistance with a call, was enough for Erin to shift perspective if only somewhat. In her endless pursuit of praise she happily assisted the woman she once conspired and attempted to stab. Whether or not this was satisfactory remains unknown, but she continues to focus on her. While her fixation is more akin to that of a teenage girl obsessing over a pop singer than a common creep, she still observed and recognised to be one.
Erin is not only representation for these individuals who never recover from their illnesses, who never beat it, but also an ode to the world in which I myself did not get better. I ask this fact remain in mind as you read throughout this biography.
Another note; This biography is atypical in many rights, firstly, it is not pretty. It is cold, colourless, and bland. It is designed from the perspective of a researcher (myself) studying Erin as she evolves and documenting her life and her relationships. Within this perspective, she is not a person, but a datapoint. As I tell Erin's stories through her relationships, rather than telling you my idealised version of her, you will learn about her through the lens of her relationships, her interactions, and how the events she shared with them influenced her life and development both. This is an enormous labour of love that has been worked on since I created Erin. It involves actively recounting many specific details of her numerous relationships and is subject to update and should be regarded as incomplete until further notice.
If you ask me "Where is xyz" I will add them if there is something to add, don't test me.
I have left out the family section as it is all TBA as of current.
CASE REPORT
Subject of Study:
| ERIN KATAYAMA |
| Katayama, Erin A CURSORY REVIEW OF AVAILABLE LITERATURE INFO AVAILABLE ONLY IF FOUND OUT ICLY |
Executive summary
Biographic and Demographic summaryErin is a woman of mixed Chinese and Japanese descent, her build is scrawny and underweight, though she has some muscle, primarily within her legs. A couple of small scars adorn her neck as well as a cigarette burn at the collarbone. Numerous scars are littered across her abdomen and lower back, varied in size. Erin has long black hair with deep purple highlights streaking throughout.
Scars and Other Defining Features
Below her right eye there is a small, thin, and an almost perfectly vertical cut, about an inch long, ever so slightly offset inwards towards her nose. There is a small horizontal scar barely visible on the left side of her throat. Her right shoulder blade and both collarbones are pockmarked with small puncture wounds, though the right collarbone bears a cigarette burn the left does not. The front of her chest is adorned with numerous small lacerations. Right along the crease between her left arm and chest there is an enormous stab wound. Moving down to her left abdomen “FAKE HELPER” is carved into her, accompanied by three stab wounds, one larger and two are smaller, clearly from two different types of blade. There is a medium sized stab wound in her right abdomen. “Sorry not sorry, Angel” was carved into the inner part of her left forearm. Numerous regular lacerations in varying sizes and forms mark her inner left forearm. Seven off-set laceration scars mark the right wrist in specific, shaped similarly to an M that was clawed out. Further up the arm there is a large stab wound scar with the profile of a katana, with a second even larger one beside it, closer to her body, and a large slash mark across the outside. There is a ‘C’ shaped scar on the back of her right hand, while her right wrist has a large rectangular burn pattern going across the width of it. Her left thigh has a large stab scar on it, as well as the back of her left knee has an incredibly large scar across it.
Daily Carry Items
Her trusty baseball bat rarely, if ever, leaves her side. She also never leaves home without her plushie shrimp, Shrimpy, which usually adorns the top of her head! Erin carries her own ID Card as well, usually tucked in the bottom of her schoolbag with an autograph from Yokota Tsukumo. Aside from this, she carries around a modified school bag, which is lined with Mylar insulation to keep its contents cool 24/7. Within this bag she always carries sports jellies or “Energy Jellies” for electrolytes when people are injured or dehydrated, alongside it she carries water bottles, an ice-pack, numerous packets of paracetamol, her own medications, and her taped together, bloodstained, Beach Red Medkit.
Key insights
The most important knowledge gained during the studies of our subject, Ms Katayama, would be that of her fixations and obsessions, particularly, the dependence that comes with it. Loyalty is not something otherwise described by her behaviours, with the sole exception of her fixations. On the other side of the coin is her devotion to retribution over perceived slights and injustices. She is hot-headed and acts without thinking, regularly. She operates without due regard for her own safety and winds up in situations where she is liable to be taken advantage of or harmed egregiously.Recommendations
The studies’ official recommendations on dealing with Ms Katayama are summarised below and detailed here;Threatening Ms. Katayama is not a successful means to an end, her regard for the self remains theoretical at best. That being said, recent studies show this is also true of her loved ones, unintentionally, that is. No matter how you interact, if it is beyond passing pleasantries, caution is recommended to be exercised. It is suspected that there do exist methods of earning her compliance and friendship though, which are unknown to our studies, they seem to be only accessible to certain demographics of women.
Introduction
The most important things in Erin’s life as identified are the people in it, beyond a shadow of a doubt.Of those people, the following stand out as role models to Ms. Katayama:
Role Models:
Miyako Sakai
Detective Sakai, quite possibly the closest thing Erin has had to a mother during her life in Karakura. Erin’s first memorable encounter with Miyako was during an otherwise unremarkable foot patrol in which she accompanied another officer, the closest thing she has had to a dad, Sinner Volkonsky. Erin doesn’t particularly remember this trip too well, just that Miyako was very relaxed with her being there, asking no questions. Erin would regularly encounter Miyako as she made her way through Karakura, particularly as she visited KPD, as she often did, regularly offering them homemade food. The next moment Erin had with Miyako was during her thirty-third milestone when she limped into KPD having just fought her then nemesis Jeon Sang, barely clinging to consciousness. Miyako would go on to take Erin to the hospital expeditiously, even waiting for her to finish treatment. Erin eventually gained Miyako’s number, which she would use to periodically reach out, oftentimes for small bits of advice or help. Her relationship with Miyako would eventually evolve following her thirty-eighth milestone when she managed to convince Jeon to confess to his crimes in exchange for clemency from Erin, in which Erin selected Miyako to be the one to process the confession and arrest, which she did. After which, Erin thanked her profusely and even cried in her arms as she gave Miyako her thanks. Since then, Miyako has been someone Erin has sought guidance from on numerous occasions, though Miyako and Erin’s closest moment thus far was their heart to heart. Erin’s forty-seventh milestone, a conversation important enough it had Erin beginning to implement radical changes, with a dedicated return to therapy and an honest to Kami intention of recusing herself from the thug life. Only one of those changes would stick, however. A psychotic break would change this all for Erin. How Miyako will react or if she will learn remains unknown, though the burden of guilt seems to weigh heavily on Erin’s conscience. Following Erin’s discharge from hospital during her fifty-second milestone where she was tortured to death, she managed to speak with Sinner and Miyako together. While Miyako was less immediately forgiving of the circumstances that placed Erin in such a position than Sinner, she still managed to give Erin what she needed in that moment from her, which was her support. As she did for Sinner, she sobbed in her arms too, apologising and pleading the truest, sincerest vow against violence she could, one largely upheld to this day. Their time was unfortunately cut short by what Erin could only surmise was a fellow KPD being stabbed, however, though Erin still received the validation she so desperately needed from her.
Sinner Volkonsky
Sinner, met during Erin’s nineteenth milestone, where she walked into KPD for a trivial reason not even she remembers. She met Ares, the very recently made ex of Shiro Nataka, having recently fought with him, though based on the shape of Ares it was more of a beatdown than a fair fight. At this time, Erin had zero respect for the police, actively harassing them when she saw them oftentimes yelling “I smell bacon, I smell grease, I smell the Karakura police” and engaging in other similar acts of disrespect. Though Sinner would change that, affectionately referred to by Ares as 686, his badge number. Erin would take to calling him this as well, not wanting to seem too friendly with the cop at first. Though, seeing how he treated Ares, as insolent as the child was, spoke to her in a way that she hadn’t thought possible. She respected him. She would once bring him food, as a thanks for how he treated Ares, a gesture of respect. This turned into Erin occasionally bringing him food, homemade by herself as always, as a means by which to socialise with him. Sinner would quickly turn into Erin’s go to cop, regularly texting him with her issues, rather than going to KPD since the rest were still unknown variables to her. He was the good one to her, though her trust would expand rapidly after her twenty-sixth milestone, where she fought with Miyako “Maki” Mayumi, her former gang member, after she was bitten by a bear. Erin had attempted to treat Maki’s injuries since she refused to go to hospital and wound up with a severe concussion, several stab wounds, and a slash or two. She was left bleeding out slumped against the wall in her home, where the first and only call she made was directly to Sinner. Sinner himself being unable to leave the station due to regulation, swiftly sent his partner, Osaki Mori, to Erin’s aid and was readily there at her bedside by the time she exited treatment. This could be regarded as the first true moment where Erin reconsidered her stance on the police entirety, while Osaki is a lawyer, she learned that Sinner kept good company, and felt wrong to judge them all by her preconceived notions of law enforcement, and from this moment, Erin would start to attach to Sinner in the way that Ares had. A sort of protective figure, not quite viewing him in the fatherly capacity she would come to, but this would be a foundational moment to that. While they stayed in thorough contact, their next big moment wouldn’t be until Erin’s fifty-second milestone, had come and gone. Though, she had her doctors text him when she was first hospitalised, him, Miyako, and Tsukiko. With her fifty-fifth milestone, the conversation she had with him itself was much more serious. She vaguely confessed her sins to him, and his voice had layers of disappointment baked into it, but his words were still every bit as supportive as Erin needed. Erin went so far as to say some words seldom said, that she loves him. She relayed the same vow she made herself to him, one to stay away from violence, which was greeted as well as she wanted. ‘As long as you swear to keep yourself out of harm’s way from now on, there’s no reason for us to ever be disappointed in you ’
Kaida Yukitomo
Kaida had been a repository of wisdom for Erin and having been something of a mother figure to the Katayama’s, at least her and Roo in the early days of her time in Karakura. Particularly so with her having been there for her first memories in Karakura. Erin’s first memory and subsequently her first milestone in Karakura as a kid was that of witnessing three instances of major assault on her family, to which Kaida came to the aid of, delivering the three to the hospital and offering Erin comfort and a lifeline to reach out to in the event her family’s antics became too much, which they soon would in Erin’s second milestone. Kaida came to her aid this night as well, where Erin was kidnapped by Jeon K Sang after watching a fight outside of the then Speakeasy with her Auntie Roo, wherein she was threatened to be stabbed and cut by him before he stole her. As Roo fought Jeon, she called Kaida who came to kick ass and drag both of the Katayama women out, handling him with ease before escorting Erin and Roo to her home where a discussion ensued and wound up with Erin living with Kaida for a month due to feeling unsafe living with Roo and a feeling of general anger with her for refusing to listen to her. During Erin’s fifth and sixth milestones wherein she decided to join a gang, more specifically, join Asuna in the Parabellum Bratstvo, she consulted with many of her family, though she discussed the most with Kaida, sitting for hours listening to her warnings and something that could be described as a cautionary tale. She strictly told her not to join Sinnerous, despite an offering from a close-ish friend, Kaida encouraged her to pick the option where family is present to protect her. Her eleventh milestone happened the night Roo went missing and wound up being cut and stabbed by Jeon while Kaida was forced to watch. She scoured the city coordinating with Uncle Tobi to find her, she didn’t succeed but she managed to find Jeon K Sang with Shiro Nataka in powerplant, eerily close to when Kaida reported finding Roo. Following her treatment, a discussion between the family transpired, Erin announced she was leaving Parabellum and proclaimed Kaida to be, in her eyes, the closest thing the family has to a mom due to her protective nature over the Katayama’s. Erin’s thirteenth milestone was following a series of unfortunate events that led to her reflecting on her life choices in the wake of Angel walking out for the second time, she asked for Kaida’s assistance in staying sober and on what she could do to improve her life’s course, and she took the advice she was given and ran with it, making amends with those she could, asking everyone she can to not sell her liquor, and ultimately meeting with a counselor to discuss her educational future at the suggestion of Kaida. After a prolonged period of absence in Erin’s life, Kaida returns for Erin’s fifty-fourth milestone, quite conveniently. As Erin is dropped off at Koribureku by Vahalo , following her release from her extended hospital stay earlier that day, she runs into Kaida outside who offers to chat with her. Erin, in the most emotionally vulnerable state she’s ever been in her life, happily accepts her comfort. Dumping everything that’s happened, everything that’s led her to this point. The torture of one of her closest friends, the torture of her mentor, her own torture. She sobbed in Kaida’s arms as she was reassured over and over again, this being her first ounce of comfort since her wedding day. They finish off the night, with what seems to be a return to form, Kaida as a shoulder to rely and cry upon for Erin.
Vahalo Kakōs-Hattori
Someone who served as a mentor to Erin for quite some time. Vahalo was the only nurse consistently present within the nurses office of KHSCC for the longest time, and back then, Erin was able to weasel her way into the nurses office as an unofficial volunteer. She spent months of her life here, triaging and treating wounds of her fellow classmates fastidiously. She kept excellent charts and often made Vahalo’s day easier. When it comes for Erin’s ability to take care of others, the training and practice she did here was foundational and Vahalo’s importance to this is to never be understated. It was during Erin’s twenty-fifth milestone that she found an affinity for volunteer nursing. This started with her friend, Ava, who had drunk a near lethal amount of coffee and Erin wound up hanging out in the nurses office all day while she waited for the caffeine to clear Ava’s system. Erin had always had a love for helping people, but Vahalo truly facilitated it. Whether he wanted less work for himself or what, not so known, but it was quintessential to her development. The pinnacle of this story arc however comes in Erin’s forty-eighth and fiftieth milestones in which she sought retribution on her then friend, William ‘Anderson’, for torturing him. 'Retribution' as it were, was exacted but not without a heavier price for Erin. The retaliation for this transgression would yield a sum result of Erin 'dying' for Vahalo in a way.
Romantic Endeavours
Angel Yamashita
The progenitor of modern day Erin. Having met her after Erin had an argument with her friend, Angel’s aunt, Rikka during her eighth milestone. Angel sought Erin out following this, where she took advantage of Erin's lack of better judgment and overwhelming susceptibility to intimidating women. Taking her off to a cave for a coffee date, which was a pretty weird pick, even weirder was taking her off to the beach to sleep with her the night they met. Angel was unique, interesting, and most importantly to Erin, insanely hot, extra insane, extra hot. Angel was the type of person to treat those around her like toys, pets, and Erin was no exception, regularly referred to as pet instead of her name for a large part of their involvement together. She embraced this attention without protest, unwilling to deprive herself of Angel's presence by resisting. Erin was molded by Angel, shaped by her presence into the shell of a woman she is today. Angel left Erin alone a lot, regularly walking out on her, never intending to come back and in spite of her horrific animalistic treatment of Erin, she consistently begged Angel back. When begging failed, she acted out, because she always had to come back to clean up her ‘pets’ mess, at least… until she didn't, which would mark Erin’s fourteenth milestone, Angel’s departure. While she was often cruel to Erin, before those were moments of tenderness, just as she would retreat back to her sectioned off self. One of her final notes to Erin before her disappearance regarded her as being her heart. The excerpt reads as follows:
“...I don’t like my heart. It’s too soft for a city like Karakura, which is why I keep it aside.
You are my heart Erin and I will leave you be and pretend you don’t exist…”
Niny Sumisu
Niny was someone who was never meant to be as near or dear to Erin’s heart as she is, which makes the story of her not too dissimilar from those Erin holds close. You never plan love. Erin never got to that stage even, not until long after the doors on that chapter of her life had closed. Long before Niny had ever learned of Erin’s woes or even knew her name, Erin had undertaken efforts to presumably save her life, ironic considering how their last interaction had gone. During Erin’s twenty-fourth milestone she was informed by a friend, Inosuke Saeku, that a woman whose name she’d only heard in passing, Niny, was kidnapped. Now, Erin never succeeded in finding her but it was the first time in Erin’s story where she truly rallied the people around her into a coordinated effort, organising a solid group of people to look for this woman. It felt good, arguably one of the first times in Karakura where Erin felt a sense of personal pride. Intentionally or not, Niny was someone now important to Erin. Many months passed after this, Niny and that event becoming something referred to only in passing or whilst reminiscing with friends who helped her look. No, it was not until Erin’s fifty-ninth milestone that Niny appeared once more. A few weeks had passed since Erin’s Date of Death and she finally mustered up the courage to leave her apartment for the first time. It was there she ran into Niny once more. They conversed, briefly, before returning to Erin’s apartment for what can only be considered beyond trauma-dumping, trauma-landfilling, perhaps? She spilled every detail of what had been done unto Vahalo, how she exacted her retribution, how she roped Akane into it all. She described the horrors inflicted upon her with even more detail, weeks had passed since it had happened and Erin had no comfort, no reassurance, no hand to hold until this moment. Not even her wife, which is something Erin remained very bitter about. For the first time since her passing, she no longer felt alone. Erin would never admit this to anyone other than Niny, not in such bold words at least, but Erin credits Niny with having done nothing short of saving her life that night. Every ounce of comfort offered to her in that dark moment? Savoured. Cherished. Clung to. The way she feels for her is something of a mystery to Erin this day, but to call the feelings toward her as a desperate love would not be inaccurate. Niny may have left like the others, but Erin views her no differently over this, if anything her coming in her darkest hour was a sign. Erin had a guardian angel.
Digital forensics have yielded an account in Erin's name in which we suspect prose posted to it regards Niny, an excerpt is listed below;
"How do I tell her [Erin's the******] that your presence felt like rainfall on a droughted lake...
...The broken clock is already right twice a day, more often than most people,
but springs to life when powered. You are that energy, that drive,
the one who makes every moment right..."
Lucy V. Evergarden
TBA
Friends
Akane Stark-Kuznetsova
Erin met Akane just before discovering William had betrayed her trust and her faith in her by torturing Vahalo. She knew Akane was related to Vahalo, and she knew his torture was personal to her by the way she conducted herself, paraphrasing "DID YOU FIND HIM TORTURED? NO, SO GET IN LINE" is what she said. After the identities were confirmed she spent a few days seeking Akane out through varied means before finally securing her number and establishing contact. Their first true face to face was... abrasive. Such was business with Akane, but Erin was used to much worse than abrasiveness, allowing for Akane to let out her frustrations toward Erin without issue. She invited her to torture William, who had agreed to receive twice the punishment in exchange for confirming the identities of both of the accomplices. Akane would soon join her in the chilled depths of the cave at what remains of the Saiky Estate on the Itsbyoshi trail. Following the first day of torture, Erin would accompany Akane home after classes, where news regarding a text and the torture would send Akane into a spiral, which resulted in her room and phone being destroyed, these damages being exacerbated by Erin's persistence. Additionally, Erin sustained a bat wound to the head and a minor concussion. Regardless, as Akane fled the apartment, Erin would pursue her around the city relentlessly trying to return her to home, eventually succeeding. Following their return to her home, Erin would fully repair and clean the damages Akane left as part of her understanding. She knew, not in full but she knew, how stressful of a time this must be for Akane, and despite how much of a pain in the ass she is to her, Erin still wanted to do what she could to make things easier.
Soren St-Yves
A rather unappreciated and under-sung voice in Erin's life, Soren. Present from early on in the days of Angel. At the time, Soren was Erin's insight into Angel, much to the dismay of Soren though, an adamant advocate for safety within those whom Erin dated and found attraction towards. Soren is a unique exception to Erin's story, not playing a major role in many of her milestones, she finds herself even under-represented in our data, though this can be attributed to Erin's suspected unwillingness to maintain healthy relationships. In spite of the efforts of Erin, and those unhealthy relationships, Soren tries valiantly to insert herself as the sole support system within Erin's life, entirely without success. In a surprising twist, despite turning away her help at every turn, Erin has held Soren in high regards and as a close personal friend. A fact which has not been expressed to Soren whatsoever, nevertheless, she persists.
Yurii Akiyama
TBA
Nayeon Baek
TBA
Marigold Volkova
TBA
Inosuke Saeku
TBA
Xara Zindel
TBA
Sumake Tendo
Quite possibly one of the most unique mentions that Erin would regard as a friend is the schools head chef, Ms. Tendo, the only non-student to make Erin's list of identified friends. Erin mentioned Tendo early on in her private journaling as 'the coolest chef ever' and 'Shrimpy's second biggest fan.' We weren't sure what to make of this one. Though, further notes do mention her to have been over to Erin's home and making some delicious baked goods as part of an apology to a tutor who's day Erin had credited herself with ruining, with a selfie of the two in her kitchen alongside it. Since then, mentions are sparse other than a small message from when Erin returned to Karakura about how she was happy to see she still worked there and a note in parenthesis about potentially playing Helldivers 2 together. . . We weren't sure what to make of this one either.
Shock
The single-most saddening entry found during our study. Rather than attempting to contextualise this incredibly abstract relationship within our research scopes, for the purposes of clarity, the team has elected to include Erin's journal entries regarding shock into the paper. They are as follows.
23 June 2025 - Voice memorandum, archived, transcription provided below:
"They told me I died, said something about the time, I'm lucky to be alive- Whatever... I don't even remember it. I refuse to even speak to the hospital staff, the only reason I am even recording this is because I can't use my fucking hands. What I do remember was pain, a lot of pain and then something just clicked, like being dunked into an ice bath, or so I imagine. It wasn't cold, not at first, but the sensation hit like that cold snap. Slowly everything started to feel duller, like a thick blanket wrapped around each and every nerve. I leaned into it, or at least I tried to as much as I could. Then and only then did things start to get cold, particularly around where they'd hurt me, stabbed me. It radiated inwards as a cool sensation poured over my skin, what I assume was my blood, but this I paid no mind to. Everything was engulfed by the blanket and the chilliness became a greater distraction than the pain was a stimulus. In that moment, it was my only friend and I loved this friend dearly, almost as much as life itself."
1 March 2026 - Text memorandum, drafted to her digital journal but not published:
"I met with an old friend recently, it wasn't pleasant by any means, but it was welcomed. A couple times now. First was for 13 stab wounds. 11 to my abdomen, 1 to my chest, last one to my neck. We barely touched hands before someone found me and whisked me off and I was unconscious and loaded on painkillers. It wasn't until a few days later we met again, some 30 odd to my back. Like pin-pricks coated ice-water before I was carted to hospital. I barely remember its touch that day, but it was comforting. I miss it."
22 March 2026 - Text memorandum, drafted to her digital journal but not published:
"I got what I wanted. I don't think God quite understood me when I said I miss it. That didn't mean I wanted to meet it again. This one was bad, katana. Through and through, I remember instantly keeling over. Before I even hit the ground that same cold-snap hit as I landed on the ground, a chilled 'puddle' creeped around my abdomen as I crawled out of the cave. I called 110 and then blacked out. Woke up post-op being told KPD needed to speak to me and I was gonna be in recovery for a few days, nothing new. Nothing could have prepared me for who walked through those doors though. Miyako. The look on her face made me regret ever missing it. I'm sorry Mom."
Enemies
William 'Anderson'
TBA
Jeon K. Sang
TBA
PARASOCIAL ENCOUNTERS
Min-ji Aeun
Someone who would be less than thrilled to know she’d found their way onto this list, though for now Erin can only dream, delusionally, that these feelings are returned. A woman of many comforts and many injuries to Erin, someone who by all means should not be listed but is. Shortly following Erin’s identity change, she found herself associated with Min-ji marking her sixty-seventh milestone at a time where many were cruel to her and Min-ji was no exception, not in that regard, but she found herself setting an example otherwise. A cruelty marked by warmth, something that kept Erin coming back. Their moments of sincerity were precisely that; sincere. Genuine. At a time where warmth and kindness both were at a premium, Min-ji became the least bad option by a mile, even coming to be the first and only person who knows Erin runs the 555 Fan account. An altercation happened one night as Erin found love within another who has since departed Karakura. Min-ji had kept her ‘order’ to Erin simple. Learn that she was the best Erin was ever going to get or don’t come back. Time passed and with it changes came. Erin left too and returned to Karakura without resolving this conflict. Shortly upon returning she found herself before Min-ji again, a substantially changed woman, all for the worse unfortunately. All she had found between there and here were infinitely crueler people, the memories of which she once sought comfort with turned soured by new experiences and Min-ji ’s words rang truer than ever before. In her eighty-fifth milestone, Erin reunited with her fully, coming back to her side and remaining there throughout her eighty-ninth milestone in which Min-ji turned cold towards Erin, for a period. Her once retaliatory attitude towards Erin’s transgressions became a proactive one and following repeated misgivings which only served to hurt Min-ji, she reciprocated that suffering. With this, they remain in an unstable matrix of mutual co-existence with Erin relying heavily on her presence for support, hoping for a happier future with her.
Yokota Tsukumo
Yokota happened to catch Erin’s attention in a rather unique way, and by that we do mean Erin has created an Onrain account dedicated to the stalking, or in her words ‘appreciation of’, Yōkota. To most, Yōkota is regarded as mean, an "opp", or to former allied gang members of Erin, a potential stabbing victim. Even considering this is something Erin regrets deeply but refuses to even acknowledge having participated in. Despite a pronounced lack of success, she still works to repress the memory of attempting to hospitalise her idol all the same. Erin’s fixation with her was initially superficial, being a 7 foot tall woman with a uniform and a weapon she was a natural subject for a person such as Erin to fixate on. Though her asking something of Erin, assistance with a call, was enough for Erin to shift perspective if only somewhat. In her endless pursuit of praise she happily assisted the woman she once conspired and attempted to stab. Whether or not this was satisfactory remains unknown, but she continues to focus on her. While her fixation is more akin to that of a teenage girl obsessing over a pop singer than a common creep, she still observed and recognised to be one.
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