But Thou Must: When he has the chance to kill Tohma and Sohta, he refuses to do it, as it goes against his principles. In the first case, it is the Library Girl who kills Tohma, and in the other case, it’s a voice in his head (implied to be Aki) who forces him to kill Sohta.
Determinator: Like his female counterpart. He refuses to kill Tohma or Sohta, even knowing it is for the sake of Misao, however.
Hello, Insert Name Here: His default name is Aki, much like his female counterpart. He is called Akito here because Word of God considered calling him Akito when adding him in Version 2.
New Game+: Initially unlockable in a second playthrough in Version 2. Version 3 averts this, even allowing you to play the “Truth” ending with him. You still have to go through the main story as him first though.
Nice Guy: Even nicer than Aki, as he seems upset even when Yoshino is killed. Fridge Logic kicks in when you realize that of the two, only Aki would know how Yoshino acts without any guys around.
Karma Houdini: In the Good Ending. Subverted, since he is punished in the continuation of the game, the "Truth" ending, after Misao drags him to the other world and he gets trapped there, presumably forever.
Your Cheating Heart: At the same time as he was supposedly dating Misao, he was also going for Saotome. Ultimately, neither girl is pleased about this.
Ayaka is Aki's friend. She is a fangirl of Mr. Sohta and she spends most of her time talking about him and annoying Aki.
Back from the Dead: Unlike the other students who were killed, she is revived in the "Truth" Ending by Onigawara, due to the fact that she was the only victim who Misao wasn't out for revenge against.
Innocent Bystander: Is the only character whom Misao did not have any plans for at all; Misao wants Aki to help her get her revenge against just about everyone else. Ayaka just happens to be in the wrong place at the wrong time, and she gets offed by Sohta after learning what he did to Misao.
She Knows Too Much: The reason that Mr. Sohta killed her. She discovered pieces of Misao's body in his desk, and quickly realized what it meant.
Ret Gone: Unlike the others, this is her fate in only the Good Ending. In the "Truth" ending, she is revived by Onigawara, due to her being the only one out of those who were killed that wasn't a target of Misao's revenge.
Skewed Priorities: When weird things suddenly start happening around the school, her immediate response isn't to look for somewhere safe, but to rifle through the desk of the teacher she has a crush on.
Stalker with a Crush: Towards Sohta; she's going through his personal belongings to find out his secrets. According to Word of God, stalking people she likes has always been a habit of hers, and after Onigawara revives her in the "Truth" ending, she becomes quite smitten with him. Her stalking will continue.
Aki and Misao's classmate. She was also the then-girlfriend of Tohma.
And Your Reward Is Infancy: She, along with Yoshino and Kudoh, is reincarnated into a baby after Aki is able to free her soul from Misao's curse.
And Your Reward Is Infancy: She, along with Kudoh and Saotome, is reincarnated into a baby after Aki is able to free her soul from Misao's curse.
Asshole Victim: Yoshino's bullying is so bad that Aki is not the least bit upset about being unable to save Yoshino. Unlike Akito, who is genuinely distressed when she dies, despite knowing that she was a bully.
Big Bad: He is responsible for Misao’s death. Technically, the entire plot of the series is his fault.
Berserk Button: If his good looks are pointed out or if he is romantically rejected.
Childhood Friend Romance: Had a crush on his classmate Takano, because she was the only person who was kind to him then. It didn't quite pan out, as she revealed that she only talked to him out of pity.
Dark and Troubled Past: He went out of his way to be kind to people despite everyone hating him, tried to save a dying cat, and yet could never be happy. What broke him was when Takano, the one person who was ever kind to him, rejected him when he declared his love for her and she confessed she only hanged out with him out of pity.
Dying as Yourself: After his Heel Realization moment, he age-regresses back into his younger appearance and disappears. Yes, Sohta was still a scared, damaged teenager underneath his mask.
Expy: A seemingly normal guy who is actually a serial killer who has a hand fetish due to an incident in his younger days, kills everyone who finds out who he is (included a Satellite Character who found his secret by accident), the ghost of one of his victims manipulates events so he could be punished for his acts, is Hoist by His Own Petard when he dies and in the end his spirit cannot enter Heaven or Hell? Sounds like Yoshikage Kira to me!
Fetish: Has a fetish on hands. When Ayaka finds Misao's severed hands in Sohta's desk, he comes along and Ayaka learns that Sohta apparently does things with the hands.
When he was young, the first thing he liked about his First Love, Takano, were her hands.
Freudian Excuse: Bullied by his classmates for being plain and ordinary? Check. Turned down by his First Love and Only Friend, who actually just pitied him? Check. Goes through a face surgery so he would be loved and accepted, only to realize that people only love him for his looks? Check and check.
He Knows Too Much: He kills Ayaka after she found Misao’s severed hands in his desk. In the Bad End, he kills Aki after she finds out Misao’s true murderer.
Karma Houdini: In the Bad End. He not only kills Aki and gets away with it, but he never gets caught for murdering Misao and it is heavily implied that he will continue with his rampages if another girl accidentally pushes his Berserk Button again...
I Am Not Pretty: It turns out that Sohta was unattractive in his youth. When he overheard Ayaka and her friends talking about Sohta as her homeroom teacher, they complimented him on his "beauty". He then stormed off to the bathroom and started punching the mirror.
Not Good With Rejection: Somewhat justified, knowing his back-story. He's tried making friends even since he was a young man. However, people were repulsed by his apparent unattractive features, mostly girls. Finally, when he thought he made a genuine friend, it turns out that she doesn't care about him and befriended him out of pity. He snaps and demands to know why he can't make any friends. Later, when he attempted to "comfort" Misao after she was raped, he killed her after she freaked out.
Ret Gone: His fate in the Good Ending, as he, alongside the others who died in the other world, gets erased from existence and nobody in the real world remembers them.
Generic Cuteness: Word of God was surprised by how many players thought Misao was cute. It's possible that the "Truth" scenario (which was added in version 2) gave her a gloomy personality to justify her social status amongst her peers.
Nice Girl: Aki views her this way and was sad when she disappeared, since she'd always wanted to try to befriend her. Word of God is that before dying and becoming a vengeful spirit, she's probably the nicest character in the whole game.
Walking Spoiler: Like Sohta, it is hard to talk about her without spoiling half of the plot.
Woobie, Destroyer of Worlds: After suffering trauma after trauma at the hands of bullies and then getting murdered by Mr. Sohta, Misao curses the whole school and starts picking off everyone who ever wronged her one by one.
Yandere: For Tohma. She'd intended for Aki to kill Tohma, not Mr. Sohta, because even though Mr. Sohta ultimately wronged her far more, she's afraid of him. And wants to be with Tohma forever.
Onigawara is the student council president at Aki and Misao's school. He guides Aki/Akito through the game. He seems to be Ogre from Mad Father.
The vice-president of the Student Council and most likely the assistant of Onigawara. She is also a guiding force in the game, much like Onigawara, and a supporting character. Like Aki, players can name her, though the English version adds Novella as her default name.
Beware the Nice Ones: If Aki refuses to befriend her, she kills her offscreen. Also, when Akito has the chance to kill Tohma but refuses to do it, the Library Girl does it in his place, simply because Tohma was annoying her.