The characters from Cross Channel:Remember, everyone here is insane. It's the whole point of the story. So beware of spoilers, which may or may not be marked.
Our protagonist, an attractive, superficially charming boy prone to sexual harassment. He has strained relationships with the rest of the cast which he is trying to repair. The sight of blood and emotional upset tend to set him off, leading to extremely deranged behavior which he regrets immensely.
Diagnosis From Dr. Badass: Taichi displays uncanny medical knowledge at certain points during the game, quickly and effectively diagnosing injuries his friends have received. Later it is implied that he learned these skills - among others - from Youko, with whom he also committed mass murder during their childhood.
Driven to Madness: Due to Taichi being gang raped and then being forced to kill his rapists. Which, oddly enough, isn't what made him snap. The final nail was Youko's horrified look after she made him do it.
Drives Like Crazy: He's probably not even of age anyways, and he doesn't have a license.
Freak Out: Taichi had one as a kid after killing a ton of people for Youko. The killing he was able to cope with. What screwed him up and turned him into the horrible mess he is today is the sheer horror he saw on Youko's face at the brutality.
Freudian Excuse: Dad died before he was born, mom died when he was a baby, repeatedly physically and sexually abused as a child, committed mass murder afterward at the behest of his co-conspirator, who reacted in sheer horror of what he did. The last is what finally broke him.
Freudian Slip: Taichi accidentally calls Nanaka "mom" later on in the game. Subverted, as she actually is his mom.
The Gadfly: Taichi trolls his friends, which actually makes him pretty charming and normal seeming. Two problems though: One, it's a mask. Two, due to being deranged he has trouble knowing when he's gone too far.
Go Through Me : Taichi defends Kiri from Youko when she tried to kill her. Youko stops attacking once Taichi threatens to cut off connections with her
Meaningful Name: Taichi sounds very similar to "tachi," which is used after pronouns to indicate "this person and everyone with him" (watashi-tachi means "us" and anata-tachi means "you guys" and so on). Kurosu is similar to "korosu," which means to kill. Put the two together and you get "kill everyone." Could also count as a Prophetic Name.
Don't forget that the "kuro" in "Kurosu" means black, and Taichi frequently thinks of himself as "black-hearted"...
A far more subtle one occurs in the form of an anagram. "Kurosu Taichi" can be rearranged into 6+1 in Japanese, or "roku tasu ichi". What do six and one equal? Seven!
Sad Clown: Taichi himself. He may try and make jokes and harass everyone, but he doesn't even consider himself human.
Second Year Protagonist: The dynamics are there, but the actual school system makes it difficult to say how strictly accurate it is.
Stepford Smiler: Taichi fakes being a clown in order to get along with others. Tomoki is shocked to discover the truth, though he did wonder how someone reputed to be as unbalanced as Taichi could be so normal.
Trauma Conga Line: His entire life. It'd probably be enough to drive anyone insane, really.
Taichi's upperclassmen, she wears glasses and is a stickler for rules. Her brother is a friend of Taichi's, though they have an extremely strained relationship due to Misato's obsessive compulsive need for order and proper behavior, which is especially demanding for those she views as friends and family. This led to her turning in her father for a crime he committed for her sake though she really did not want to do it, thus causing the rift with her brother. The first arc is dedicated to her.
Sesquipedalian Loquaciousness: Misato delivers a rather wordy speech to Taichi about the Broadcasting Club's purpose. Taichi's response? "You're pretty good with your Japanese."
Stepford Smiler: Hides from her problems and it is implied that she's into self mutilation due to psychological stress and self loathing. She also commits suicide during several routes.
A surly, detached girl who does not understand why she has to go to this school. Her issues involve a realistic depiction of a tsundere, traces of yandere/stalker behavior and extreme dependence on others. Appears to hate Taichi. She once dated him when he tried to make normal human relationships with other, but he forgot that that everyone he knew is also insane, even those who appear normal. Deeming the relationship doomed to failure, he cut ties with her, leading to a suicide attempt in order to regain his attention. The second arc is dedicated to her.
Attention Whore: Appears aloof in order to get attention, and once she has it, she'll do anything to keep it.
Yandere: The reason Taichi broke up with her is that as time went on her dependence on him grew and she started edging into this. He swiftly, brutally and mercilessly halted the relationship.
Miki's friend, she possesses a strong hatred for Taichi. Her psychological issue appears to be over dependence and clinging to some figure, which is at the moment Miki. She a certain degree of paranoia as well. Through the story, she feels threatened by Taichi, which is understandable considering his irrational violence, though in the end she is not much better herself. She seems to understand Taichi the best of the main cast with the possible exception of Youko. She hates Taichi because she thinks he killed her brother Yutaka, but in fact it was a suicide. The third arc is dedicated to her.
Girl with Psycho Weapon: Thanks to the fact that everyone appears to have vanished from the world, she becomes increasingly terrified of Taichi and begins to train with a crossbow. Causes a few bad endings. Unknown to her, actually acting out against Taichi is a bad idea since it just means Youko will kill everyone.
Living Emotional Crutch: To Kiri, in chronological order: Yutaka, Miki, and Taichi. This appears to be her "ultramarine". Of course, Yutaka dies before the story properly begins, Miki becomes rather broken due to the reset, and Taichi sends her back once she finally warms up to him, but he at least helps her get over Yutaka and become normal enough to adapt to society.
The Token Mini Moe, she is one of the few able to keep up with Taichi and even match his sexual harassment. One of Taichi's closest friends, they have a policy of mutual harassment and the innuendo slung between the two is ever present when the two converse. She appears to be a case of clinical sociopathy, though is generally not dangerous. Thus, the feelings of others never mattered to her. The fourth arc is dedicated to her.
Cute and Psycho: In some iterations with the justification of apparently being a genuine sociopath. But she's normally pretty cheery and harmless.
Lack of Empathy: Miki's "ultramarine". She has enough to have feelings for others, but doesn't particularly care for anyone else's. Taichi is somewhat similar, but it's more like he has problems understanding people in general.
Stepford Smiler: Miki reveals near the end of her route that she can't relate with human beings and that her Genki Girl behavior is just an act in order not to cause alarm.
Suspiciously Vague Age: Miki gives very evasive, semi robotic answers when question on their exact age. She should not have a problem sharing this kind of information with Taichi, so it's almost surely an oblique reference to this trope. But she may be a subversion: In her own route, she's been avoiding the reset button for several subjective years.
Token Mini Moe: Miki is treated and acts like a kid, but, to Taichi's disappointment, she isn't really a little girl. In hindsight, her refusal to answer about her age makes somewhat more sense because she's older than she should be. Also, due to being older than he remembers, her body has also matured.
A mysterious but extremely capable girl who tends to act as an observer throughout most of the story, she is extremely submissive to Taichi's will. Thus, whenever Taichi needs something done he will often ask her to do it. She apparently stalks Taichi and frequently claims to love him, but only annoys him and he denies that she loves him. She is the reason he is so profoundly broken: She manipulated him into killing the foster family that enslaved and molested them and at his moment of purest vulnerability reacted with horror to what he had done for her sake, utterly shattering his mind. The fifth arc is dedicated to her.
Freudian Excuse: Took the same abuse as Taichi, but what broke her was her realization of how badly she ruined Taichi. Ever since then, she's had a single minded obsession with doing whatever he wants, but he claims she's doing it for her own sake, not his. He's partially right and knows he's only partially right.
Not So Stoic: Youko totally breaks down during Taichi's "The Reason You Suck" Speech, having been an Emotionless Girl (Other than creepily smiling during her send back route,) for most of the game. Hell, it's the only moment in the story where her sprite significantly changes poses.
Patient Childhood Love Interest: Deconstruction. She won't leave him alone. Taichi only tolerates her because he doesn't want to hurt her and quite obviously views her as a stalker.
A mysterious girl who appears detached from the rest of the world. She is aware of the time loop, but will only hint about the situation to Taichi or nudge him into useful directions. No one but Taichi ever sees her, and he is not even sure what she is. She is actually Taichi's deceased mother. It is unclear how she came to be in this world even as the ghost she apparently is.
Absurdly Youthful Mother: Although we're not sure how old Taichi is, Nanaka looks just as old as him if not younger. Miki might be heading the same way, which isn't too good once you remember that she came from a poor family.
Manic Pixie Dream Girl: Definitely has some of the hallmarks of one. Somewhat played with in that her main job is to make sure Taichi stays sane.
Maybe Magic, Maybe Mundane: Is Nanaka an alien, an agent of the divine, a ghost, or simply Taichi's delusion from what he remembers of his mother? He wonders about this for a moment before finally concluding that he doesn't care, and was just happy she was there to help him.
Rape Is a Special Kind of Evil: Subverted. While he raped Taichi when he was younger, Taichi actually feels a certain amount of pity for him: With his father and the people he knew, Yutaka didn't have much of a chance to actually be a normal kid... but managed to grow up into an okay guy anyway once he repressed those memories.
Taichi's other surviving male friend, he's also Misato's younger brother and frequently accused of having a crush on her. He deeply resents her for turning in their father for a crime he committed for her sake, but when it is explained she literally can't help doing things like that he cools down. And he is indeed a siscon.
Freudian Excuse: His resentment of Misato is fueled by her 'betraying' their father. When the circumstances involved are explained, their relationship improves.
Straight Man: While he might not be the sanest, he's certainly the most coherent.
Suspiciously Vague Age: Tomoki gives very evasive, semi robotic answers when question on his exact age. He should not have a problem sharing this kind of information with Taichi, so it's almost surely an oblique reference to this trope.