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Voiced by: Shoya Chiba (Japanese), Justin Briner (English)
- Abusive Parents: He was raised in the White Room, where he was put through so much Training from Hell that he's the Sole Survivor.
- Ambiguous Disorder: Kiyotaka's penchant for manipulating people, seeing people only as tools to be manipulated in order to further his own goals, a shallow emotional affect, self-centered attitude, and an abusive childhood all point to traits consistent with Antisocial Personality Disorder. Furthermore, his aloof attitude and him wanting to isolate himself from others also adds traits from Schizoid Personality Disorder.
- Kiyotaka is more of a Broken Ace than legitimately suffering from mental disorders.
- Bad Guys Do the Dirty Work: He undoubtedly does morally ambiguous deeds the others wouldn't do, but they can benefit from. Sure, his only goal is personal gain, but he subconsciously helps others.
- Bishōnen: He's a more manly variant, but definitely good-looking.
- Brilliant, but Lazy: Despite his insistence that he's just an average guy, he seems to be quite skilled and competent not just in academics, but also martial arts. This changes somewhat over the course of the series.
- Chaste Hero: Mostly Played for Laughs. He always notices when other girls look sexy or are interested in him, and simply chooses not to do anything about it.
- Averted HEAVILY in the L Ns as he, like damn near every other guy, showed a pretty obvious attraction to Kushida, but she's Kushida so.... Also, there's his relatiinship with Karuizawa Kei. He's also well aware that Airi likes him and even personally ruened down another girl's confession. Though it's because he genuinely didn't understand 'romantic love' and didn't want to lead her on... which actually led him to seriously think about and look into it more. Again, Kei.
- Chick Magnet: As more of his capabilities being revealed, such as almost outrunning the Student Council President during the school festival in Volume 5, he begins to have the affection of many women in the class, such as Sakura, Kei, Maya Satou and Haruka Hasebe. Later on, Ichinose as well.
- Clark Kent Outfit: His school uniform hides the fact that he has a noticeably muscular body, especially in comparison to his male classmates.
- Crouching Moron, Hidden Badass: When he stops Manabu from hitting Suzune, Manabu attempts to attack him instead. Ayanokouji manages to skillfully evade his attacks in a way that only someone who's spent time learning martial arts could have done. When he's asked if he took martial arts lessons, Ayanokouji simply claims that his only extracurriculars were piano lessons and calligraphy.
- Declaration of Protection: Makes one to Kei after saving her from Ryuuen and company:"If anything like what happened today ever happens again, if anything bad ever happens to you, please remember that I will definitely come and save you."
- Defrosting Ice Queen: More present in the manga. Despite his insistence otherwise, a lot of Kiyotaka's arc revolves around him legitimately starting to view his classmates as friends.
"I was starting to sound worked up, or perhaps I was actually feeling worked up. Maybe because Id started to, rather selfishly, consider her a friend. I didnt want Horikita to come to regret her decision."
- Hints of this show up WWWAAAYYY earlier in thd LN, as far back as volume 1, namely in his inner monologue over why he wanted to help Suzune after the encounter with her brother.
- Gag Penis: In volume 8, it's revealed that he has a huge asset during a boy's bath when they compared to each other. Even Kouenji is surprised even though he has one too.
- Hidden Depths: Chabashira warns Suzune that of all the "oddball" students in class D, Kiyotaka is the strangest one of them all, and suggests she learn more about him before she can transfer to Class A. It takes talent to intentionally rig his grades to exactly 50% across the board. A brief flashback to his childhood in episode 6 leaves several questions about his upbringing.
- Jerk with a Heart of Gold: Mostly subverted, as he's essentially a selfish person who plays with others with a kind act, but while Ayanokouji easily manipulates people for his benefit, he subconsciously helps people which earns the feelings of Sakura, Kei and later Ichinose as of volume 9 as he helped Ichinose confront her past and even challenged Arisu for Ichinose.
- Double subverted in that Kiyotaka isn't nearly as selfish in the extreme as the anime makes him out to be. If anything, he's less selfish and more socially darwinist and pragmatic about his actions. That said, it's a mindset born out of having had next to no real meaningful relatio ships prior to the story.
- The Man Behind the Man: Kiyotaka's modus operandi. He prefers to influence and lead his classmates from the sidelines rather than draw attention to himself. Due to this, he often has a habit of passing of his schemes as plans others thought of.
- Mistaken for Romance: Many of his classmates mistakenly think that he's Suzune's boyfriend, because he is the only guy and the person in general with whom she communicates. He does, in his own broken and awkward way, actually consider her a friend of sorts.
- The Mole: Played for Laughs in episode 7. He snitches Ike, Yamauchi, Yukimura and Sudo's plan of planting a camera on the girls' locker room to Horikita, ensuring that she deletes the footage without their knowledge.
- Nice Guy: Played with. Kiyotaka is tolerant, kind and willing to help friends; on the other hand, his life philosophy differs from that of the All-Loving Hero in the direction of moderate cynicism with heavy notes of Social Darwinist.
- Nominal Hero: He's actually anything but heroic and cares only about his own freedom. On a D&D chart, he would be True Neutral. This changes as the seriesgoes on and as he makes more meaningful and personal relationships.... but 9nly to the extent that he'snot a totally list cause. Later events force him to fight to maintain his freedom.
- No Social Skills: This goes back and forth as he is fairly good at reading the mood of others, but it absolutely terrible at expressing his own emotions.
- Obfuscating Stupidity: His attempts to pass himself off as a Ridiculously Average Guy don't always work.
- Comes off as a very average person, but is hiding multiple talents on top of having rigged his scores in his entry exams.
- And not just in the entrance exams but also in his tests. The novels goes into more details: Chabashira revealed that he not only solved a difficult problem - only solved by 3% of all students this year - he also included a complex formula and used it flawlessly while getting the wrong score on a question with a correct answer rate of 76%.
- Ridiculously Average Guy: By his own admission, Kiyotaka has no distinctive characteristics, hobbies or interests and makes no effort to stand out.
- Secretly Selfish: The big reveal at the end of Episode 12/Volume 3 is that despite his seemingly uncharacteristic altruistic actions, in actuality the only thing he actually cares about is securing his own freedom. He has no qualms about using his classmates as pawns in his schemes to do so.
- Social Darwinist: He is ready to help the weak or those who are in trouble, though only for personal gain, but he also believes that equality does not exist and is impossible in principle.
- Sociopathic Hero: It's revealed later on that the face he puts on in front of everybody in the cast is pretty much a mask; truthfully, he cares nothing for any of his other friends and sees them as tools to use to further his own goals.
- Stock Light-Novel Hero: Revealed to be a deconstruction in the final episode. Multiple hidden talents? He was trained at childhood to be the best at everything, to the point he only cares about winning. Gaining the attraction of women? Calculated moves to earn their trust and make them easier for him to manipulate. Moral conscience? He has no such thing. He only wants to protect himself and will only help people if it advances said goal.
- Unscrupulous Hero: Kiyotaka intentionally tries to maintain amicable terms with his classmates and is capable of reading social cues. Despite this, his true motive is only to maintain his current lifestyle and not be sent back to the facility he was raised. Deep down, he only views most of his classmates as tools, with the exception of few people he is close to.
- The Stoic: Hardly reacts to anything.
- Worthy Opponent: There are a few people who could hold the title to him, notably Arisu later in the novels. Notable in that he actually wants to have one because he wants to defeat his father by having the man's greatest creation, himself, be defeated.
- What Is This Thing You Call "Love"?: His monologue in volume 7.5 is this, when he was preparing for his Christmas date with Maya Satou.
Voiced by: Akari Kitou (Japanese), Felecia Angelle (English)
- Academic Alpha Bitch: Suzune is an exceptional student and she knows it, but her brother indicates that she's been assigned to Class D because she can't work with others. She does try an intervention with the three dumbest students, but they walk out after tiring of her constant insults towards them, and she immediately decides to let them fail out of the school and stop dragging on Class D as a whole.
- Action Girl: Held her own against Mio Ibuki despite having a fever for a week.
- Adaptation Expansion: Due to the anime being a Compressed Adaptation, Suzune has been promoted to the "female lead" of the series. In the Light Novel, the female lead changes from arc to arc.
- Aloof Dark-Haired Girl: Has dark hair and is aloof and even hostile sometimes.
- Annoying Younger Sibling: To such a level that her older brother is willing to physically assault her.
- Arch-Enemy: Played for Laughs with her hatred of Kushida, which she demonstrates by ignoring her at every opportunity. Later events in the novel play this trope seriously during their confrontation.
- Big Brother Worship: Is intent on proving her worth to her brother, to the point where she doesn't pay any heed to his humiliation of her.
- Broken Ace: She is virtually perfect academically, sure, but that means nothing in a setting where classes are judged via group excellence and not individual skill. Manabu all but states that Suzune wouldn't have been stuck in Class D if she were willing to socialize with her peers.
- Deconstructed Character Archetype: Tsundere Yamato Nadeshiko. She is beautiful, clever, graceful, skilled in self-defense, and is devoted to her family, but her arrogance and contempt of ordinary people led to her having no friends since early childhood. Moreover, Kiyotaka practically becomes her main contact with the outside world, because without his help, she is not even able to talk with classmates without starting a conflict.
- Friendless Background: Suzune hasn't had any friends since kindergarten.
- Foolish Sibling, Responsible Sibling: Zigzagged. In spite of being a very smart girl and an excellent pupil, her differences with her brother are so great that she isolated herself from other people and devoted her whole life to education in order to earn his respect, to no avail.
- Good Is Not Nice: She may be a good person and have good intentions, but Suzune definitely isn't kind in her demeanor.
- Ice Queen: Rejects any and all attempts to befriend her.
- It's All About Me: She initially claims to only care about herself. Her brother berates her for that attitude, and mentions it's one reason why she ended up in Class D. She seems to start opening up to the others later on, albeit at a very slow pace, and still claims she's only helping others out for her sake.
- Jerk with a Heart of Gold: Pretty much everyone would see her as a tough, aloof, cold and even hostile person who pretends to help others only for her sake. In truth, that's essentially what Kiyotaka does, as he almost always helps others for his own benefit, while she actually has a good heart and genuinely cares for others. Not that she'll easily see someone as a friend, though.
- Mistaken for Romance: Many of her classmates mistakenly think that she dating Kiyotaka, since he is the only person in general who is close to her. Kushida even teases her about this in episode 7.
- Only Friend: Kiyotaka is her only "friend" and the one person with whom she communicates. But it is invoked, so-as she deliberately isolates herself from other people.
- Perpetual Frowner: This is her default expression.
- Rapunzel Hair: Her hair goes past her waist.
- Ship Tease: With Kiyotaka, particularly in the anime. In the light novel, however they have a more antagonistic relationship.
- Tsundere: Type A. She coldly rebuffs any attempts from other people in making friends, yet has no problems talking to her implied Love Interest Ayanokouji.
Voiced by: Yurika Kubo (Japanese), Sarah Wiedenheft (English)
- Bitch in Sheep's Clothing: Her sweet personality is a facade. She's actually quite manipulative and resentful.
- Dude Magnet: She quickly earns popularity from the guys, being a Ms. Fanservice who is eager to befriend everyone.
- Genki Girl: Normally tries to act like one, but Kiyotaka finds out she Zigzags this when he sees her at the end of episode three, when she's ranting about how much she hates Suzune's stuck-up attitude and her refusal of Kushida's repeated attempts to befriend her.
- Good Eyes, Evil Eyes: Displays this in episode 3 of the anime shortly after leaving Kiyotaka's dorm room. The evil eyes come out when she displays her darker personality. He wonders which of her personalities is her true nature and which was an act.
- Hate at First Sight: In the novel only, she claims this was the case with Ayanokouji.
- Hates Being Alone: She tells Ayanokouji that she hates being suddenly left alone, and it's left as a possible reason for her insistence on being friends with everyone.
- Living Emotional Crutch: Implied Trope in Episode 8, when she tells Ayanokouji that she doesn't like to be alone. Though she never finishes her sentence, her disappointment in him walking away from her implies that she was hoping that he would be the first to accept the truth about her.
- Male Gaze: Her breasts get the camera's attention a lot.
- Mysterious Past: In the novel, it's hinted that she'd met Suzune at some point in the past before enrolling in high school. When Ayanokouji asks about it, she dodges his questions.
- Nice Girl: Her default attitude at school. It's an act.
- Secret Keeper: Does this with Ayanokouji, such as claiming that she was the one who obtained the old exams which helped their class tremendously during their midterm exams. Later on she forces him to keep her darker personality a secret, lest she accuses him of trying to rape her.
- Ship Tease: Averted in the light novel. They have more antagonistic relationship, as she hates him and he is wary of her. Zigzagged in the anime.
- After her true nature is revealed, someone asks Kushida if she and Ayanokouji are dating and she gives a casual "Nope"; he concludes that those are probably her true feelings.
- However, in Episode 8, she interrupts Sakura's botched Love Confession to Ayanokouji and, when he tries to excuse himself from her presence, she slips back into her darker side briefly and tells him that she doesn't like being alone. She adds that she "hoped that he would..." and then she trails off, leaving everyone to guess what she was about to confess to him.
- In episode 12, she asks Ayanokouji who he would pick if it came down to a choice between herself and Horikita.
Voiced by: Mao Ichimichi (Japanese), Leah Clark (English)
- Attempted Rape: Episode six reveals she has a stalker who sends her disturbing emails and pictures he's secretly taken of her. It later turns out to be the electronics store employee who took her camera in for repair. Fortunately he only gets as far as unbuttoning her jacket before Kiyotaka shows up with Honami, along with two police officers who promptly arrest Airi's assailant.
- Cannot Spit It Out: It is pretty obvious that she has feelings for Kiyotaka, especially after he saves her from a rapist. But due partly to the other girls around him, and her own shyness, she never manages to tell him she likes him.
- The Glasses Gotta Go: Though they weren't real prescription ones, she takes them off after Kiyotaka saves her from a rapist and it's implied she won't need to wear them anymore. She still wears it from time to time.
- Hidden Buxom: While she looks average in her uniform, her street clothes make it obvious she's as big as Kikyo.
- Meganekko: And it turns they are Purely Aesthetic Glasses.
- Morality Pet: An interesting variation of one for Kiyotaka who intentionally orchestrates most of of his Pet the Dog moments in an effort to manipulate people. Sakura interestingly enough is the one person who he is genuinely kind to without an ulterior motive.
- Nice Girl: A kind and adorable Shrinking Violet.
- Rapunzel Hair: Her pigtails go all the way to her waist.
- Rose-Haired Sweetie: One of the most benevolent people in the novel, really.
- Shrinking Violet: She's a shy and nervous person who hates when people stare at her.
- Surprise Witness: She inadvertently becomes one during Sudo's trial against three Class C students who claim he beat them up after she reveals a picture that she took while the incident with Sudo and the others took place behind her. Though this doesn't clear Sudo's name, it does at least buy his classmates a few more days to try to come up with an alternate solution to his frame up.
- When She Smiles: She looks prettier when she smiles.
- Ship Tease: She has lot of it with Kiyotaka, both in the original novel and in the anime and is also one of the girls who are close to him the most, the first being Karuizawa.
Voiced by: Ayana Taketatsu (Japanese), Bryn Apprill (English)
- Attention Whore: Her biography says she likes being the center of attention.
- Beta Couple: She and Hirata get together in the anime. Later in the Light Novel it's revealed that Hirata is merely The Beard, due to Kurizawa intentionally trying to attach herself to the most popular guy in class.
- Blackmail: In volume 4 of the light novel, Kiyotaka blackmails Karuizawa into effectively becoming his assistant in his various plans, since he doesn't like drawing attention to himself. This eventually grows into a more legitimate partnership.
- The Confidant: Essentially works as one to Kiyotaka, since she is the only person to have seen his true personality thus far. Thus she has the most insight into his plans, even if she doesn't really understand them.
- Damsel in Distress: She runs into trouble with Ryuuen and his gang in volume 7, and Kiyotaka has to come and rescue her.
- Demoted to Extra: In the anime, and heavily so. In the Light Novel, Karuizawa is the one to give the Rousing Speech to the school about how Class D will eventually promote to Class A, not Suzune. She also ends up arguably becoming Kiyotaka's closest friend in the class, becoming more prominent in the later volumes and the heroine of a few arcs.
- Defiant to the End: Even when she was bullied terribly by Ryuuen and his lackeys, she never revealed Ayanokouji, surprising both him and Ryuuen's lackeys. Ayanokouji then rescues her.
- Hidden Depths: Despite the novel and especially the anime, depicting her originally as a very silly and frivolous girl, in the future she becomes one of Kiyotaka's closest friends.
- Ship Tease: In the original novel, she has a lot of this with Kiyotaka. The anime instead pairs her with Hirata.
- Stockholm Syndrome: The same Kiyotaka that intentionally exposes her to Class C's bullying is the same Kiyotaka that offers to protect her from all potential threats as that would make her more loyal to him, and one that she basically pledges Undying Loyalty to because of his actions.
- Stock Shoujo Bullying Tactics: In middle school, Kei was subjected to some traumatic bullying by the girls there. She was humiliated, forced to confess to people she didn't like, was given animal corpses, and other nasty things just to make her upset.
Voiced by: Ryota Ohsaka (Japanese), Dallas Reid (English)
- Broken Ace: Hirata has been highly implied to be one; he is one of the smarter Class D students, fairly athletic, a social butterfly, and is effectively the "leader" of the class. Despite this, the series has been vague about what his actual Character Flaw is that landed him in Class D. Even Ayanokouji and Horikita, who are both good at reading character's hidden motives, have a hard time sizing Hirata up.
- The Charmer: Kiyotaka notes on the first day of class that Hirata is such a people-person that the rest of the class immediately gravitates towards him.
- Decoy Leader: In a sense. Hirata is treated and viewed as the leader of Class D by his peers, but Kiyotaka is normally the one who actually works as the problem solver behind the scenes.
- Extreme Doormat: Hirata's defect is that he's a people-pleaser to a fault.
- Mysterious Past: It's initially not clear why someone with his good grades would end up in class D. Later it's revealed that he was traumatized over his old friend committing suicide in middle school.
- Nice Guy: Hirata's most distinguishing feature.
Voiced by: Toshiki Iwasawa (Japanese), Christopher Wehkamp (English)
- Gag Penis: He, alongside Kiyotaka, have the largest assets amongst the male cast as revealed in volume 8.
- Hunk: And how, and that's the main reason he's so narcissistic.
- It's All About Me: Seems to only care about himself, and doesn't seem to care about the others in his class at all. One big issue he causes is during episode nine, when the students are stuck on a deserted island for a week. He claims that he's not feeling well, despite having just swung around through the trees like a monkey hours earlier. This unfortunately costs his classmates 30 S points, and they only have 300 with which to work with during the weeklong excursion. As the episode ends, he's seen climbing the chain on the ship's anchor, seemingly in healthy shape.
- Narcissist: He stares at himself at the mirror quite lot, and the reason why he's at the D-class is mostly because of this.
- Upper-Class Twit: He's from a wealthy family and they apparently pay for his points if he needs them.
Voiced by: Eiji Takeuchi (Japanese), Brandon McInnis (English)
- Fall Guy: Three Class C students attempt to frame him for an assault. Though Sudo does attack them, he claims it was in self-defense. Their story also has some holes in it, as Suzune wonders how he managed to hurt three guys around his size without taking a hit at all. In a normal fight, Sudo would've been at a huge disadvantage since it'd be a three on one fight. Suzune and Kiyotaka later clear his name using their own deception, and the three Class C students end up getting punished by the mastermind behind this incident.
- Fiery Redhead: Has red hair and is pretty aggressive when angered.
- Hunk: He's muscular, tall, handsome and manly.
- Jerk Jock: Although he's ultimately a Jerk with a Heart of Gold. He may be rude and angry, but by no means a bad guy.
- The Millstone: At least from Suzune's perspective. Sudo is academically one of the weakest students in class, shows no interest in improving and his brash personality means that he is a magnet for false accusations of misbehaviour. Basically at the early stages of their school year Class D will have to carry him across the line if they expect to have him graduate.
- Ship Tease: He gets a lot with Horikita in the original novel, and has a crush on her too.
Voiced by: Daiki Abe (Japanese), Aaron Dismuke (English)
- Lazy Bum: One of the less than stellar students of class-D.
- Nature Lover: Proves to be one of the best people during the deserted island excursion. His previous camping skills come in very handy as he's able to identify a river, manages to start a campfire, and easily identifies various fruits some of the girls bring back.
Voiced by: Mutsuki Iwanaka (Japanese), Travis Mullenix (English)
Voiced by: Satoshi Hino (Japanese), Jarrod Greene (English)
Voiced by: Rina Hidaka (Japanese), Trina Nishimura (English)
- Berserk Button: Apparently using her small stature to insult her really grinds her gears.
- The Chessmaster: Unlike Ryuuen who uses a direct approach, she prefers more subtle ways. She's even seen playing chess against herself.
- Classy Cane: Walks around with one of these.
- Connected All Along: A bit of an odd case due to the encounter being entirely one-sided, with her seeing Ayanokouji when her father brought her to the White Room 8 years prior. But the meeting seems to have stuck with her, considering she can recall the amount of time she last saw him, down to the number of days.
- Friendly Enemy: Is very friendly and explicitly states that she holds no ill will towards Ayanokouji in spite of her goal of "burying" him. This is because she knows that is exactly what he wants.
- Nice Hat
- The Rival: Seems to have a rivalry with Ryuuen for supremacy.
- More directly in a rivalry with Ayanokouji later in the novels, though an odd example because it is only because he wants her to be one and defeat him.
- Villainous Crush: Possibly has one towards Ayanokouji.
- Worthy Opponent: Considers Ayanokouji one.
- Yandere: Shows shades of this in a short story from her perspective. She apparently always dreams about Ayanokouji, thinks about him all the time, and expresses a desire to make him hers (whether that's romantically, or literally is a bit ambiguous). She also internally mentions how she doesn't care about Class A's position at all, only caring about how she can directly defeat Ayanokouji to fulfill his wish.
Voiced by: Nao Touyama (Japanese), Kristi Rothrock (English)
- Dude Magnet: She's noted to be popular, which incurs Suzune's jealousy.
- Even the Girls Want Her: One of her classmates even says she loves her.
- Hair of Gold, Heart of Gold: Has blonde hair and is likely the most kind-hearted and selfless character in the series.
- Nice Girl: Her kindness is genuine unlike Kushida's.
- Rapunzel Hair: Reaches her waist.
- Ship Tease: She likes to flirt with Kiyotaka and confesses in the seventh episode that she sympathizes with him.
- Starts developing genuine romantic feelings for him as of volume 9. Later at volume 10, these feelings became more evident, but she's still oblivious about it.
- Smarter Than You Look: Proves herself to be much more clever than she appears at first glance, and is also a good student.
- Token Good Teammate: While they're not a team, out of the characters in the series, she's definitely the kindest, and doesn't have antiheroic qualities. Yeah, she's both a good and a nice person, unlike Suzune and Kushida.
Voiced by: Akihisa Wakayama (Japanese), Ricco Fajardo (English)
Voiced by: Masaaki Mizunaka (Japanese), Eric Vale (English)
- Ambition Is Evil: Well, not exactly evil, but he wishes to ascend in the class ranks, and unlike Horikita, he intends to do it by crushing all other classes.
- Break the Haughty: Volume 7 has him completely beat, with his right hand students taken out by Kiyotaka and Ryuuen himself getting the daylights punched out of him. But what really breaks him isn't this humiliating defeat, it's the fact that Kiyotaka can do this without batting an eye and doesn't seem to hold any emotions towards him at all.
- The Bully: First introduced provoking Sudo into to attacking him while he had backup.
- Hunk: He may be a jerk, but is undeniably handsome and manly with a muscular body.
- Jerkass: The guy is unpleasant and dismissive with everyone he interacts with.
- The Rival: Seems to have a rivalry with Sakayanagi for the supremacy of school.
- You Have Failed Me: A non-fatal version, but he still makes his hired muscle beat up the three students that he hired to frame Sudo for being tricked into withdrawing the complaint.
Voiced by: Mikako Komatsu (Japanese), Jamie Marchi (English)
- Bitch in Sheep's Clothing: Stole Class D's card from Suzune despite them letting her stay when Class C kicked her out.
- Don't You Dare Pity Me!: Does this when Airi, Kiyotaka, and Haruki find her sitting next to a tree on the island, with some obvious signs she's hurt. Despite claiming to be their enemy for this trip, they take her back to their camp, along with offering her some fruits they found.
- Everyone Has Standards: Seems to be furious at Ryuuen's methods.
- Kick Chick: Her fighting style resembles capoeira.
- You Gotta Have Blue Hair: Turquoise to be precise.
Voiced by: Yuichiro Umehara (Japanese), David Matranga (English)
- Big Brother Bully: When Ayanokouji first sees Suzune talking to him privately, all he sees and hears is her brother berating her and calling her a fool for choosing the same high school as him. He then holds one of her hands up, and seems ready to hit her before Ayanokouji steps in. However, her behavior prior to the intervention suggests he's beaten her in the past.
- Jerkass Has a Point: For all his insulting of Suzune, she was truly mistaken in thinking isolating herself from her peers proves her independence.
- Genius Bruiser: He is one of the best pupils of the school, but he is also an excellent sportsman and fighter who can safely jump off the second floor and stand in the way of the two warring factions.
- Mr. Fanservice: He has excellent musculature in the seventh episode, which only adds to the pluses of his handsome appearance.
- Student Council President: He is the personification of the male version of this trope in the anime.
- The Stoic: Manabu shows composure in almost all situations, if this does not concern his sister.
Voiced by: Konomi Kohara (Japanese), Apphia Yu (English)
Voiced by: Rina Sato (Japanese), Jennifer Alyx (English)
- "Blackmail" Is Such an Ugly Word: Chabashira effectively says this to Ayanokouji, after revealing that she received a letter from the facility that Ayanokouji was raised, demanded that he be expelled. Chabashira makes an unveiled threat that she won't follow through with it but in exchange, Ayanokouji has to stop half-assing his performance in class.
- Hot Teacher: Despite her stern personality, she's definitely attractive.
- Rapunzel Hair: While she wears it in a ponytail, it would reach her waist if she let it down.
- Secret Keeper: Towards Ayanokouji concerning his background.
- Sink-or-Swim Mentor: Taken to an absurd degree in the sense that she never reprimands or even warns her students of the consequences of their misbehavior. Chabashira and the school's mentality is that the students should be judged on their merit, so no warning on her part was needed since it should have been common sense.
- Stern Teacher: Despite her initial disdain towards Class D and their behaviour, she praises them appropriately for performing well on a test, and is willing to take up on Kiyotaka's offer to raise Ken's failing mark in exchange for points.