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- All of the Other Reindeer: In the original novel, Kouichi was a target of bullying at his previous school in Tokyo due to sharing the same last name as a middle school murderer.
- Always Save the Girl: He will do anything to protect Mei, even turn against the entire class when they try to kill her because they think she's the extra student.
- Apologetic Attacker: He apologizes to Yumi before kneeing her in the stomach to protect Mei.
- Bad Dreams: He has a couple.
- Berserk Button:
- Do not even think about hurting or blaming Mei Misaki, even if it's for the curse. If you do, he will do all he can to protect her. Even if you come at him with a knife.
- One of the students set him off by hitting Miss Mikami, as it's his Aunt Reiko as well as his teacher that was hit.
- Bishōnen: More so in the anime.
- Bloodsplattered Innocents: In Episodes 7 and 11. Poor Kouichi.
- Break the Cutie: Whenever he watches someone die, which is often since most of the deaths happen in front of him.
- Brutal Honesty: Even though Izumi is dying in front of him and asks if he remembers their first meeting, instead of lying and letting her die happy, Kouichi just says 'no'. Izumi even lampshades this trope before she dies.
- Declaration of Protection: He promises to protect Mei.
- Death by Childbirth: His mother died when he was born, though it looks like she was actually a casualty of the curse placed on the class her younger sister was currently in.
- Determinator: He takes a lot of damage in Episodes 11 and 12, but it doesn't stop him from trying to find and protect Mei.
- The Hero
- Ill Boy: Damn collapsed lung, keeping him in the hospital! And making him miss his first day at his new school, which means missing the tips about the "other student"! The first episode suggests that it's hereditary and he got it from his father.
- Irony: He reads horror stories in his spare time, such as works by H.P. Lovecraft and Stephen King. Now he's in one.
- Kill the Ones You Love: He's forced to kill his dear aunt and mother figure after Mei reveals Ms. Mikami is the dead person of the class.
- Missing Mom: His mother died after she gave birth to him.
- Named After Somebody Famous: His last name "Sakakibara" is the same as a real life middle school murderer from Kobe. He was bullied because of this in the original novel.
- New Transfer Student
- Nice Guy
- Nice Job Breaking It, Hero!: Kouichi had been in the hospital at the start of the year, so he didn't know anything about "The Calamity" or the measures the class set up to protect themselves. Since he'd already meet Mai once before, he thought nothing of approaching her and starting a conversation, inadvertently violating the conditions of the charm and bringing doom to everyone. At least... that's what we're lead to believe at first. It later turns out that the Calamity had already started back in April with the death of Mai's cousin/sister, so the charm wouldn't have worked anyway.
- Only Friend: To Mei. Since her classmates have to pretend she doesn't exist, Kouichi is the only one who gets close to her and befriends her. This eventually makes him a "sacrifice" as well, but he doesn't mind since he can still hang out with Mei.
- Ordinary Middle School Student: He's a completely normal student who ends up in the cursed class 3-3 and gets caught in the devasting effects of the Calamity.
- Red Oni, Blue Oni: Red to Mei's Blue.
- Secret Keeper: To Reiko and Miss Mikami being the same person. Made obvious early on in the manga and original novel, but only revealed in the last episode of the anime.
- Took a Level in Badass: In Episode 11, he protects Mei Misaki from his entire Ax-Crazy class, alone. And took a direct knee hit to the crotch before disarming the perpetrator.
- Unlucky Everydude
- Un-person: His classmates decide to pretend that he doesn't exist just like they do with Mei once people begin to die. It doesn't stop the curse.
- Would Hit a Girl: If it means protecting Mei from being killed then he'll do it.
- You Leave Him Alone!: Kouichi says something similar to this to Izumi in Episode 10, when she tried to place the blame on Mei. He does it again in Episode 11.
- Alliterative Name: Mei Misaki.
- Angsty Surviving Twin: She was hit pretty hard by the death of her twin sister.
- Because You Were Nice to Me: Seems to be the only reason why she's become so close to Kouichi.
- Big Sister Instinct: Towards her cousin/twin sister Misaki. Once she saw the color of death on Misaki, Mei became very protective of her. Misaki even noted how Mei acted like her big sister, even though they're the same age.
- Broken Bird: Before the death of her sister Misaki she was a cute and happy girl, even dressing in bright colors.
- Cannot Spit It Out: She figured out who the "Extra" was sometime before the class trip, but didn't want to say anything because it would make Kouichi sad.
- Conveniently Seated: Mei is seated in the back row by the window so she can daydream and easily exit if she so feels. It also helps her classmates ignore her.
- Defrosting Ice Queen: She warms up to Kouichi over the course of the story.
- Eerie Pale-Skinned Brunette
- Emotionless Girl
- Eyepatch of Power: Covers her Doll's eye. She lost her real left eye to cancer when she was four.
- Eye Scream: In the manga she's stabbed in her fake eye by Akazawa.
- Freakiness Shame: The second time she shows Kouichi what is under her eyepatch he remarks that her Doll's eye is oddly beautiful, and that she should go without the eyepatch more often. Her cousin Misaki thought the same.
- The Gadfly: Mei's a Nice Girl, but she has her moments. During Kouichi's first meeting with her, she inadvertently makes him think she was a talking doll. When Teshigawara accuses her of being the extra student, she decides to mess with him and say that he could be the extra. When they look for the tape and talk about The Seven Mysteries, she jokingly confirms one.
- Girl of My Dreams: In the live action movie, Kouichi first sees her in a dream.
- Human All Along: At first, we're lead to believe Mei is some sort of ghost that only Kouichi can see. Turns out she's a living human girl and the truth of the situation is a bit more complex than it seemed.
- Implied Love Interest: She and Kouichi have a lot of Ship Tease.
- Incest Subtext: At least in the anime with her cousin/twin sister Misaki. Intertwined Fingers, feeding each other, wrestling in the bed they share, wearing matching outfits, bathing together, groping each other while bathing together...
- I See Dead People: Thanks to her Doll's eye that she usually keeps covered, she can see dead people.
- Japanese School Club: She's a member of the art club. Since the students of other classes aren't affected by the Calamity, they take her in without much trouble.
- Loners Are Freaks:
- Magical Eye: Her Doll's eye can see the "color of death" on dead people or people that is about to die.
- Male Gaze: Minor, but many shots with her and Kouichi show in his POV staring at her legs and skirt area.
- Mark of the Supernatural: Her Doll's eye is green, in contrast to her red right eye. Said Doll's eye can see the color of death.
- Meaningful Name: Her first name is pronounced "May." Similar to the month Kouichi started school in class 3-3.
- Mistaken for Murderer: When Takako dies trying to kill Mei, Mei takes the knife out of her hands, just as Izumi walks in. Izumi seeing the knife in Mei's hand and Takako's corpse instantly believes that not only is Mei the extra, but also thinks she stabbed and hung Takako.
- Misunderstood Loner with a Heart of Gold
- Names to Run Away from Really Fast: In-universe, just hearing her name freaks people out. Partly because of the "charm", partly because she shares the same name as the original dead student.
- Nephewism: She was adopted by her aunt Yukiyo's family due to the Fujioka family experiencing financial problems.
- Nice Girl: She may be creepy at times, but she's actually really nice. Just ask Kouichi.
- Oracular Urchin: She knows about pretty much everything that's going on, yet she only gives very vague hints that don't really help to understand the situation.
- Polar Opposite Twins: With Misaki.
- Power Limiter: Wears an eyepatch because her Doll's eye can see "things that should remain unseen", even if Mei doesn't want it to.
- The Quiet One
- Red Eyes, Take Warning: Subverted; she seems to be sinister at first but she's actually quite nice.
- Red Oni, Blue Oni: Blue to Kouichi's and her cousin/twin sister Misaki's Red.
- Red Right Hand: Takako Sugiura doesn't remember Mei having an eyepatch in elementary school and comes to believe that Mei is the extra student who was resurrected incomplete. In reality the girl Takako met was Mei's sister Misaki, who has two functioning eyes.
- Rei Ayanami Expy: She's basically Rei with pitch black hair and an eye-patch resembling Rei's usual bandages, while sharing her red eye(s), deeply stoic demeanor and the overall feeling of creepy cuteness/cute creepiness exhaled.
- The Stoic: Nothing much fazes her.
- Not So Stoic: A comical example when she gets attacked by a small octopus in episode 8.
- Sugar and Ice Personality: She comes off as emotionless, distant and somewhat creepy, but she's actually a nice girl.
- Un-person: Her classmates pretend that she doesn't exist in hopes that it will prevent the Calamity from happening. It fails not only because Kouichi acknowledges her, but because the Calamity had already started with the death of her sister Misaki.
- When She Smiles: She seems to smile a lot when she gets closer to Kouichi.
- Zettai Ryouiki: Has Grade B in the 7th Episode.
Voiced by: Takurou Kitagawa (Japanese), Chris Ayres (English)Kouichi's father, a professor currently abroad in India due to research-related work. Kouichi's transfer to Yomiyama was prompted partly because this fact. He periodically keeps in touch with his son via calls to Kouichi's cellphone.
- Catch Phrase: "Hey son! You'll never believe how hot India is right now!"
- Disappeared Dad: Not really, but as mentioned he was overseas when the events of the story occur.
- Invisible Parents: He never appeared in the anime.
- The Unseen: In the anime, he never makes a physical appearance.
- Foreshadowing: His talks with Kouichi over the course of the series indirectly provides hints related to the events surrounding class 3-3's situation, particularly concerning the supposed irregularities related to the "Phenomenon".
- Voiced By: Naoko Sakakibara (Japanese), Molly Searcy (English)
- Badass Teacher: She was willing to protect Mei from an angry mob, when they thought she was the extra. It comes back to bite her when Mei finds out that Reiko is the real extra and planned on killing her so Kouichi wouldn't have to. Though Kouichi ended up doing the deed anyway.
- Beautiful All Along: She's rather plain-looking normally. As Ms. Mikami, she takes off her glasses, takes down her hair and gets a makeup, practically making her look like a completely different person and way more attractive.
- Dead All Along: She is the dead person in Class 3, rather than any of the students.
- Drives Like Crazy: A mild example in episode 8.
- Expository Hairstyle Change: A flashback to her younger years shows that she used to have quite shorter hair as a survivor of Class 3-3.
- The Glasses Gotta Go: In the anime, she takes off her glasses when she's working as a teacher. In the manga, this is inverted and she only wears her glasses when she's a teacher instead.
- Hard-Drinking Party Girl
- Hot Teacher: She works as the assistant homeroom teacher of class 3-3. It's made clear early in the original novel and the manga, but the anime hides they are the same character until the final episode.
- Letting Her Hair Down: Played straight in the manga where she only wears her hair loose outside of her job. Inverted in the anime.
- Made of Iron: She was struck in the head by a wooden broom till it bled and was found crushed underneath heavy rubble. Yet she still can move and talk. Though it seems it doesn't work against a pick axe courtesy of her own nephew.
- Parental Substitute: Both the novel and the manga mention that Reiko wants to be like this to Kouichi. Not so in the anime, however.
- Tomato in the Mirror: Not even she was aware that she's actually the dead person of the class.
- Adults Are Useless - Parental Neglect: She doesn't know or care about anything Mei does. Nor does she interfere in her life except for certain things. This is because she's been mentally and emotionally unstable after the stillbirth/adoption deals.
- Berserk Button: While never shown onscreen, she does not like Mei spending time with her cousin/twin sister Misaki or her aunt/biological mother Mitsuyo, in fear of Mei one day running away to her biological family.
- Chekhov's Gun: Her doll making abilities allowed her to create a replacement eye for Mei. The Doll's Eye became crucial to identifying the Extra Student.
- Convenient Miscarriage: She had a stillbirth twelve years previously. Because of this and the Fujioka family's financial problems, Mei was adopted by Yukiyo's family.
- Peek-a-Bangs: Her hair covers her right eye.
- Pen Name: Uses the pseudonym "Kirika" for her job as a doll maker.
Voiced by: Hiromi Igarashi (Japanese)Mei's deceased cousin. In reality, her twin sister.
- Ascended Extra: She's very important in the OAV.
- Death by Origin Story
- Family Relationship Switcheroo: She's actually Mei's twin sister. Shortly after their birth, Mei was adopted by their aunt after the latter's stillbirth.
- Elegant Gothic Lolita: She and Mei wear Sweet Lolita-like dresses in the OAV.
- The Gadfly: She tells a guy who was trying to hit on her the story about how meeting someone's doppelgänger (look-alike) brings bad luck, knowing her identical cousin/twin sister Mei will arrive soon. She laughs as he freaks out and runs away when Mei appears. The moment also serves as foreshadowing for the rest of the OVA, especially because Misaki dies by the end of it.
- Genki Girl
- Incest Subtext:
- Littlest Cancer Patient: Suffers from leukemia and eventually dies because of it.
- Nightmare Fetishist: She finds things that any other person would normally find weird and ugly "cute".
- Polar Opposite Twins: With Mei. She is more outgoing and cheerful than her sister. And even used Mei's condition to playfully scare a boy that approached her.
- Posthumous Character: She died a month before the start of the series.
- Red Oni, Blue Oni: The red to Mei's blue.
Voiced by: Sayuri Sadaoka (Japanese), Vicki Barosh (English)Mei's grandaunt, who works at the Misaki doll shop as a receptionist.
- Scary Shiny Glasses: As if the picture leaves any doubts...
- Shopkeeper: She takes care of the shop and tends to the customers as Yukiyo works on the dolls.
Atsushi OguraYumi Ogura's older brother.
- Canon Immigrant: He didn't exist in the manga. In the novel and manga, Izumi has an older brother instead, but his name is Kazuma Akazawa and he commits suicide.
- Cynicism Catalyst: Yumi, who seems to have been close to him despite him being a hikikomori, loses it badly after his death.
- Hikikomori: A standard example. He's only seen in his room, playing games at his computer. And this causes his death, since an excavator rams into the Ogura house and crushes him to death.
- Japanese Sibling Terminology: Yumi refers to Atsushi as aniki, a rather informal an slang-like way to refer to one's older brother.
Class 3- 3
Lovable Jock who befriends Kouichi when he joins the class. He is childhood friends with Kazami. Becomes part of Kouichi's inner circle alongside Misaki and Mochizuki.
- Bishōnen: In the manga. The anime gives him a more masculine design.
- Childhood Friends: With Kazami
- Dogged Nice Guy: To Akazawa.
- Dumb Jock: He's said to like sports, and that his school grades aren't very good.
- Heterosexual Life-Partners: With Kazami, and Mochizuki in the anime.
- In-Series Nickname: Teshi.
- Lovable Jock: Very outgoing, friendly, and good-humoured.
- My God, What Have I Done?: Reacts this way after he thinks he's killed Kazami.
- Nice Guy: He's a little hotheaded at times, but his heart's in the right place.
- Nice Job Breaking It, Hero!:
- In Episode 9, he broke the tape that was supposed to help them stop the curse. Subverted since they were able to fix it later and hear it in full.
- Happens again when he thought that Kazami was the extra and pushed him off the balcony, believing he killed him and causing Kazami to snap.
- He also manages to nearly kill Yuuya in the film. Bizarrely, Tomohiko takes a break from trying to help Takako not bleed to death to call him out for this when Naoya is not especially okay with Izumi trying to kill her.
- Nonuniform Uniform: Commonly wears a sports jacket over his uniform.
- Plucky Comic Relief: As much as one can be in a horror story, and even then it wears off as the body count rises.
- Shipper on Deck: For Kouichi and Mei. He also suggests Junta is faking being sick to get more attention from Takako.
- Those Two Guys: With Kazami and later Mochizuki.
Demoted to Extra in the anime.
- Ax-Crazy: While most of the class went batshit insane in episode 11, this guy takes it Up to Eleven in episode 12.
- Chekhov's Gunman: In the anime; he's introduced early on, then doesn't show up again until Episode 10 due to being Demoted to Extra.
- Childhood Friends: With Teshigawara.
- Class Representative
- Cowardly Lion: Is a nervous guy in the film, but his courageous, kind side helps him save Takako from death and ultimately survives the movie. He's cowardly in the anime and novel, however, without a trace of the heroism: Naoya has to bully him into coming on the class trip despite being a Countermeasures officer alongside Izumi and Takako (who both go without coercion) and in the anime he murders two girls by stabbing them in the back.
- Death by Adaptation: First thought to be killed after Teshigawara pushes him off a balcony (a cliff in the manga), but survives. Actually happens in the finale of the anime.
- Demoted to Extra: In the anime. Despite being one of Kouchi's friends and a member of the mystery-solving gang in the manga, he's pretty much sent off-screen right after the beginning of the anime. Oddly, the film gives him a much larger role; when Kouichi becomes the nonexistent student alongside Mei, he mentions being shunned by Tomohiko is one of the parts that hurt that most, as they had genuinely become friends.
- Heterosexual Life-Partners: With Teshigawara.
- Not Quite Dead: After falling from a two story balcony and being assumed dead he's able to get up and start walking around again with little problem. In the manga at least he suffers a head wound and has to be carried by Teshigawara.
- Sanity Slippage: In the anime, he starts killing off other students in a desperate attempt to find the extra.
- Ship Tease: Episode 12 hints that he might have had affections for Yukari Sakuragi.
- Those Two Guys: With Teshigawara until his death.
- Tranquil Fury: He acts completely stoic when killing the other students to determine who the extra is. However upon meeting Kouichi during his massacre he flies off the handle. It turns out the reason why, is he holds Kouichi responsible for Yukari's death.
Voiced by: Kazutomi Yamamoto (Japanese), Clint Bickham (English)A quiet, shy boy who befriends Kouichi in class. He is a talented painter, being a member of the school art club, and has a crush on Ms. Mikami.
- Heterosexual Life-Partners: With Teshigawara in the anime.
- Hot for Teacher: Apparently has a crush on Ms. Mikami.
- Nice Guy
- Nice Job Breaking It, Hero!: He was the one responsible for letting the countermeasures group listen to Matsunaga's confession, unintentionally leading to the whole class becoming an angry mob against Mei. Further, no one ever calls him for it, either in the show or within the fandom.
- Nightmare Fetishist: A mild version. He likes Edvard Munch's "The Scream" because he feels uneasy when he looks at it.
- Tareme Eyes: As a rather shy and more mild-mannered student, he has these.
- Those Two Guys: With Teshigawara near the end.
- Took a Level in Jerkass: In episode 6, he took the entire art club with him for the sole purpose of keeping them away from Mei and Koucihi who was earlier the second Un-person. Since said club members acknowledged Mei, it was obvious they weren't part of class 3-3.
- In the film, he also abandons his apparent best friend, Yu Yamada after the later is hit by a car.
Voiced by: Madoka Yonezawa (Japanese), Jessica Boone (English)Head of the countermeasures against the curse, Izumi has a lot of responsibility on her shoulders. Distant, icy, but ultimately concerned for the fate of her classmates, Izumi introduces the countermeasures to protect the class from death. Becomes close to Kouichi, convinced they met somewhere before.
- Ascended Extra: She's a very minor character in the original novel, but is given a larger role in the manga and anime.
- Berserk Button: Not following the rules is enough to earn Izumi's unending ire, although this is justified since the rules are her job and not following them gets people killed. Hurt someone she cares about ( like Takako or Kouichi), and she will very coldly beat you to death.
- Bolt of Divine Retribution: It was a lightning strike that caused the glass to skewer her.
- Clingy Jealous Girl: She tends to shoot a Death Glare at Mei whenever the other girl is around Kouichi. This isn't helped by the fact that she doesn't like Mei to begin with.
- Forgotten First Meeting: Since the beginning, she has had the feeling that she has met Kouichi somewhere before, but she can't remember where or when. Turns out she did meet him a few years prior to the story. The forgetfulness is justified since Kouichi was only in Yomiyama for the funeral of his aunt, a time erased from everyone's memories due to the events of the curse.
- Girlish Pigtails
- Hair Decorations: Her blue ribbons.
- Impaled with Extreme Prejudice - Human Pincushion: In the anime.
- Irrational Hatred: She really does not like Mei.
- Meet Cute: With Kouichi as Episode 10 reveals.
- Morality Chain: To Takako, to some extent. She does not want to kill Kouichi because it would upset Izumi.
- Sanity Slippage: In the manga and anime she eventually snaps and tries to kill Mei.
- Spared by the Adaptation: In the manga.
- Took a Level in Jerkass: Strange though it may seem for someone most closely the series' antagonist, but Izumi at least has standards in every depiction of her...except the film. When Tomohiko plays the tape explaining how to end the Calamity for her and Takako at the Inn, Takako finally stands up to Izumi (who has bullied her for most of the film) and refuses to kill anyone. Izumi's response is to stab her in the throat. Not because she might be the Extra; just because her best friend wouldn't help her instigate a witch hunt against their classmates.
- Tsundere: For Kouichi and Teshigawara. You can really spot it by her twintails, Zettai Ryouiki and facial expression alone.
- Tsurime Eyes: As a Tsundere, she's bound to have these.
- Yandere: In the manga, she tells Kouichi "I will never let you go." and has shown hints at trying to get Kouichi's attention.
- The actual line is mistranslated: she's saying "I'll never let this go" in regards to Kouichi breaking the rules and getting her best friend, Yukari killed.
- Zettai Ryouiki: Grade S.
- Class Representative
- Hair Decorations: Wears a small bow to tie part of her hair back.
- Impromptu Tracheotomy: In episode 3, she trips down some stairs and lands neck-first on the metal tip of her umbrella.
- Mauve Shirt
- Nice Girl
- O.O.C. Is Serious Business: Throughout the 3 episodes, she's been nothing but a nice girl, with a lot of questions to ask Kouichi. The only time she ever raised her voice in anger, was in episode 3 scolding Kouichi for mentioning Misaki's name. This was one of the first clues that tipped Kouichi off that Class 3-3 isn't what it seemed.
- Parasol of Pain: Her own umbrella causes her death.
- Staircase Tumble: Cruel subversion: Yukari didn't die when she slipped and fell down the school stairs, already a bad potential way to go... but when she got impaled through the neck with the metal tip of her umbrella.
- Tareme Eyes: She's a very sweet girl, and as such, she has these.
- Umbrella of Togetherness: She and Kouichi.
Voiced by: Shou Takano (Japanese), Blake Shepard (English)The other local Ill Boy.
- Ascended Extra: He was only mentioned in the manga, but at least was seen in the anime.
- Chekhov's Gun: His death is revealed to be why the innkeeper (who is his grandmother) went insane and tried to kill the students.
- Ill Boy: Has a weak heart. And it kills him
- Mauve Shirt
- Youthful Freckles: As seen in the picture.
- Ascended Extra: She is existent in both the novel and the manga, just as a completely minor character whose only role is getting killed. In the anime she's not exactly a prominent character either, but at least she interacts with Izumi and gets some action. She also fills a Nice Girl role in the film.
- Ax-Crazy: Towards the end, she fucking loses it...
- Cruel and Unusual Death: Strangling 'self to death due to some cables is not a nice way to go. Her death is notable for being the only one in the series to get a gore discretion shot.
- Custom Uniform: She wears a light grey vest over her uniform.
- Exact Words: She said she wouldn't kill Kouichi, but it doesn't stop her from beating and cutting him.
- Foreshadowing: In Episode 11, she and Izumi are talking. Takako mentions that in her old elementary school, she met a girl who was identical to Mei Misaki, save for having two functional eyes. The girl is Mei Misaki's twin sister/cousin, Misaki Fujioka, who becomes an Ascended Extra in the OVA.
- Not So Stoic:
- At the end of episode 8, Takako screams and goes into a Troubled Fetal Position when Junta dies and his corpse is accidentally chopped up by a motorboat engine. Understandable: this happened when he went into the sea to retrieve Takako's beach ball and, not knowing what actually killed him, she surely blamed herself.
- In episode 9, she is seen near catatonic after Junta's funeral and Izumi is seen trying to comfort her.
- Episode 11 confirms that she's been emotionally unstable since the beach trip, explaining her Axe Crazy behavior in trying to kill Mei.
- O.O.C. Is Serious Business: Takako is reasonably soft spoken throughout most of the series, and she's genuinely compassionate toward her friends. After surviving a murder attempt at the hands of the innkeeper her tone becomes completely flat and lifeless, and in the end she's screaming and laughing. This is to drive home the fact she's not herself... not that anyone else especially noticed or seemed to care, and she's easily one of the most hated characters in the series because of it.
- Pet the Dog:
- One has to give it to her, she decided not to kill Kouichi when given a chance, because she thought he wasn't the dead one and Izumi would be sad if he died.
- She also seemed to have a soft spot for Junta, at least enough to check on his health before the class trip; she's in fact the only person in the entire group who actually cared he was sick. She also takes his death very, very badly.
- She makes it a point to not let Izumi blame herself for failing to protect Yukari and suggests that blaming anyone won't solve things, and the class needs to pull itself together. Izumi takes the first part to hear, and ignores everything else she says.
- She never directly does anything horrible to Mei until everything goes to hell. Even when announcing to the class Mei is the Extra, she never directly accuses her of causing the Calamity on purpose; interpreting the fact she's suffering PTSD and clearly unwell (and receiving no help for it) means her broadcast is basically "Hey, we need to kill Mei because she's the Extra and if we don't, everyone will die." At the very least, it's not personal for her, the same way it is for Izumi and Tomohiko.
- Sanity Slippage: Episode 11, holy shit....
- Spared by the Adaptation: She survives in the film, thanks to Tomohiko.
- The Stoic - Perpetual Frowner: Most of the time, but much less towards the end.
- Stoic Spectacles: She is a generally serious girl, and her use of specs enhances this.
- When She Smiles: She's seen smiling sweetly in◊ these◊ pictures.
- Yandere: Episode 11 shows us she's got an... interesting view of her relationship with Izumi.
- Alternative Character Interpretation is that by that point Izumi is her only surviving friend, and she can't bear the thought of her dying. To boot, she expressly spares Kouichi at least in part because she knows Izumi has feelings for him, not something she'd likely do if she saw him as a rival for her affections.
Voiced by: Kengo Kawanishi (Japanese), Houston Hayes (English)The closest to a male friend that Takako and Izumi have, and he hangs around with them.
- Cynicism Catalyst: To his friend Takako, since his death is what ultimately sends her over the edge.
- Death by Falling Over: Subverted. He fell off the stairs at home but seemingly was more or less fine. In reality he suffered an aneurysm, which busted when he was swimming and killed him.
- Mauve Shirt: He's not the most important class mate, but is still more or less easy to recognize among them. And then came Episode 8...
- Time-Delayed Death: Died as a result of an aneurysm from an accident he had before the beach trip. He was already dead before the boat came along.
- Vomit Discretion Shot: Was throwing up alot in episode 8. It later turned out it was the result of an aneurysm.
- Ax-Crazy: Atsushi and Aya's deaths affected so badly, she ends up cracking worse than others. She even gets a Slasher Smile when hunting Mei in Episode 11.
- Beware the Quiet Ones: Normally, Yumi seems to be shy and quiet. But her ultimate breakdown turns out to be among the worst as a whole.
- Canon Immigrant:
- She didn't appear in the manga, and the hikikomori brother was Izumi Akazawa's brother instead.
- Apparently, while she did exist in the novel and survived the curse, she was just a girl who hung out with Takako and Izumi and had next to no role otherwise.
- Cynicism Catalyst: THE turning moment for Yumi is her brother Atsushi's death, thanks to the Calamity. When she snaps on Mei, Yumi openly states that she'll avenge him.
- Groin Attack: A blink and it's missed moment. She slips trying to stab Mei, only to have her land crotch first on the window sill before falling to her death.
- Hair Decorations: A pink hairbow
- Sanity Slippage: When an apparently sweet girl snaps, snap she does.
- Roaring Rampage of Revenge: In Episode 11 she cracks, goes Ax-Crazy and tries to kill Mei, believing her to be the extra student who caused her big brother's death.
- Took a Level in Jerkass: When Izumi blamed Mei for the calamity, Yumi nodded in agreement.
- Voiced by: Go Inoue (Japanese)
- Canon Immigrant: Was created solely for the anime.
- Dude Looks Like a Lady: Even more than Mochizuki, and that's something.
- Long-Haired Pretty Boy: He has wavy, shoulder-length brown hair.
- Too Dumb to Live: He was told not to check on the cafeteria. He still did and got burned to death in the following explosion.
- Voiced by: Mana Hirata (Japanese), Margaret McDonald (English)
- Alliterative Name: Aya Ayano
- Canon Immigrant: She appears only in the anime.
- Genki Girl: She starts as such. Naturally, she doesn't stay that way.
- First-Name Basis: With Takako.
- I Don't Want to Die: She says this after Kouichi saves her from falling glass.
- Nice Hat: Has a cute black one.
- The Nicknamer: Sometimes refers to others with cute pet-names, like "Kou-chan" for Kouichi or "Teshi" for Teshigawara.
- Screw This, I'm Outta Here!: Her parents attempted to do this by packing up and leaving Yomiyama by car. It didn't work: a boulder fell on the windowshill, and soon the car plunged off the mountain...
- Ship Tease: She's implied to have a mild crush on Kouichi.
Mr. Shouzou Kubodera
Voiced by: Kozo Mito (Japanese), David Matranga (English)The homeroom teacher of class 3-3.
- Driven to Suicide: He commits suicide by violently stabbing himself repeatedly in the neck right in front of the class.
- High-Pressure Blood: He sprays like, half his pupils with his own blood as he kills 'self. Holy crap...
- Madness Mantra: "I'm sure you'll understand."
- Self-Made Orphan: Before killing himself, he killed his very old and ill mother.
- The Atoner
- Badass Teacher: Don't mess with his students, even if you're a student yourself. The few times he does act he's easily able to disarm and knock down his opponents.
- Big Damn Heroes: Saves Teshigawara and Mochizuki from the insane landlady in Episode 12.
- Cool Old Guy
- Death by Adaptation: In the live action movie, he's killed when he gets in contact with Reiko and falls down in the flames. He returns in 2012 as the "Other," now class 3-3's teacher.
- Heroic Bystander: In the beginning he took the position of being the librarian for the sole reason of this trope. Before then he used to teach class 3-3 and was the reason why the calamity was triggered to begin with. He now takes the position as Librarian so that he wouldn't be affected by the curse, while at the same time, also provide info on it to those that needed it. He didn't actively help until the class trip.
- Messy Hair: In the anime.
- Put on a Bus: Conveniently Put On A Car during the summer trip's massacre.
- Unwitting Instigator of Doom: He was the one that started the "Misaki's not dead." act, which triggered the Calamity.
Misaki YomiyamaThe popular honors student whose death resulted in the class 3-3 curse.
- The Ace: Charming, intelligent, sporty and popular.
- Gender-Blender Name: Misaki is rather feminine name, but boys have this name, too. This is the main reason people mistake him for a girl.
- Nice Guy
- Plot-Triggering Death: His death was what triggered the Calamity.
- Posthumous Character
- Cute Clumsy Girl
- Elevator Failure: She falls victim to one of these, as the cords of an hospital elevator give in due to material fatigue and make it fall to the bottom... with poor Sanae inside it.
- Florence Nightingale Effect: Her close relationship to Kouichi seems to have some undertones of this.
- Hospital Hottie: A beautiful lady who works as a nurse.
Voiced by: Shinya Takahashi (Japanese), Illich Guardiola (English)
A friend of Reiko, who also was a member of Class 3-3 some years ago and survived the Calamity with her.
- Accidental Murder: Of the dead student in his youth.
- The Alcoholic
- Ascended Extra: His role in the anime is expanded to an actual appearance outside of a flashback and a few more scenes.
- Heroic B.S.O.D.: After seeing Junta Nakao die, he fully remembers the tape he left in the classroom and suffers this.
- Hero of Another Story: It's stated that he stopped the Calamity in his mid-year. By killing the extra student.
- Madness Mantra: Usually relating to how he saved his class and about the object he hid.
Tomoka Inose aka Tomoka Mochizuki
Voiced by: Mahiro Inoue (Japanese), Maggie Flecknoe (English)A friend (but not a classmate) of Matsunaga, who works in the café owned by her husband. She's also the half sister of Yuuta Mochizuki.
- Cool Big Sis: To her half-sibling Yuuta and the 3-3 kids she interacts with.
- The Confidant: To Matsunaga, as he confessed his role in stopping the Calamity to her.
- Demoted to Extra: In the novel, she's the one who relays Matsunaga's info on stopping the Calamity to the kids. This doesn't happen in the anime, since Matsunaga makes on-screen appearances there.
Jun HamaguchiA boy who was a part of Matsunaga and Reiko's Class 3-3 in 1983.
- Bolt of Divine Retribution: Sorta. He didn't do a lot to actually deserve being hit by a lightning bolt (aside of having an umbrella), but he was in Class 3-3 so...
- Parasol of Pain: He was hit by lightning through his umbrella.
- Too Dumb to Live: According to Matsunaga, he was dimmer than usual. He was the only one with an umbrella and got struck down by lighting for that.
Yuki HoshikawaA girl who was a part of Matsunaga and Reiko's Class 3-3 in 1983.
- Death by Falling Over: Once Hamaguchi died, the whole class started running around in a panic. As a terrified Yuki was trying to get to safety, she slipped and fell off the mountain's cliff.
Ryoko AkiyamaA girl who was a part of Matsunaga and Reiko's Class 3-3 in 1983. And was its first victim in that year.
- Adapted Out: She only appeared in the manga.
- Heterosexual Life-Partners: With Reiko Mikami
- Irony: She joked around about the curse... And was its first victim in 1983. And later her best friend Reiko became the "extra one".
- Nightmare Fetishist: She liked to tease her best friend Reiko about Class 3-3's curse.