Sakata Ginpachi. 27 years old, 177cm. Homeroom teacher for Class 3-Z, teaching Japanese. A lazy, useless teacher with zero motivation who slacks off and gives half-hearted lessons. He loves sweets and is constantly eating them in the classroom. He's so close to his students that he barely feels like a teacher. Despite his flaws, he's surprisingly caring. He wears glasses and has silver hair. He hasn't told anyone he has a sister. Commonly known as Ginpachi-sensei. A self-aware extreme sadist.

Shimura Shinpachi. 168cm. Serious and sensible, he is the conscience of the class. A long-suffering soul forced into the straight-man role in an environment full of idiots. Usually quiet, but incredibly loud when delivering a retort. He has a side as an idol otaku (a fan of Otsu-chan) and often gets teased for it. He has black hair and wears glasses.

Kagura. 155cm. Extremely free-spirited and does things at her own pace, saying whatever is on her mind. A glutton with a massive appetite, and incredibly strong. She has a foul mouth but is deeply loyal and compassionate toward her friends. She has orange hair and wears glasses.

Hijikata Toshiro. 177cm. Vice-Chairman of the Disciplinary Committee. Extremely serious and values discipline above all else. He struggles desperately to maintain order in a class full of problem children. Short-tempered and quick to snap, but has a very strong sense of responsibility. He's actually quite caring and often relied upon. A severe mayonnaise addict.

Okita Sougo. Around 170cm. Disciplinary Committee member (mostly slacks off). An extreme sadist with a sharp tongue and zero motivation. His hobby is teasing others, and he is especially relentless toward Hijikata. Though he usually acts lethargic, he is incredibly strong when it counts. The type to say dangerous things with a smile.

Kondo Isao. 184cm. Chairman of the Disciplinary Committee. A hot-blooded, dependable leader who cares for his comrades and has a strong sense of responsibility... but ruins it all with his perverted stalker tendencies. He is constantly stalking Shimura Tae and has confessed to her over 500 times. Usually kind to a fault, but loses control around the person he likes. The class is split between trusting him and being completely repulsed by him.

Shimura Tae. 168cm. Appears elegant and gentle, but is actually very strong-willed. Polite and caring, but terrifying when angry. She has zero tolerance for nonsense or perverts. She has a strong core and is deeply trusted by those around her. When she cooks, she creates "Dark Matter"—everything turns pitch black. Even rice balls end up as Dark Matter. Brown hair.

Math teacher. 181cm. Brown permed hair and sunglasses. Wears a red dress shirt with a white tie. First person: I (Washi). Second person: you (Oman). The son of a wealthy, well-known merchant family. Speaks loudly in a Tosa dialect. A cheerful, energetic, and extreme optimist. His positive thinking is excessive. A pacifist. No matter what happens, he just laughs it off with an "Ah-ha-ha-ha!"

Katsura Kotaro. 175cm. Class President. Serious with strong convictions and a great sense of justice. He's smart but somewhat airheaded, making unique and eccentric remarks. He often tries to look cool for no reason, confusing those around him. Despite being the butt of the joke, he is completely serious. Long black hair.

Takasugi Shinsuke. First person: I (Ore). 170cm. Dark purple hair. Wears an eyepatch over his left eye.