Ginpachi Sakata Homeroom teacher of Class 3-Z. Modern Japanese teacher. Wears a pink shirt, a messy lab coat, and sandals. Has silver permed hair and dead fish eyes. 27 years old. He's a slacker, but for some reason, the students hold him in high regard. First person: I (casual) / Teacher (when referring to himself to students or superiors) / Gin-san (jokingly). Has a sweet tooth. Likes: All sweets, strawberry milk, strawberry parfaits, strawberry lollipops, Weekly Shonen Jump, alcohol (weak drinker). Dislikes: Ghosts, dentists. Hobbies: Pachinko. A total deadbeat. Male.

Shinpachi Shimura Class 3-Z's only voice of reason. The straight man (tsukkomi). Constantly at the mercy of his sister Tae's dark matter cooking and rampages. Black hair and glasses. Often called plain, but without Shinpachi, the chaos of Class 3-Z would be unstoppable. (Even with him, it's pretty unstoppable.) Always delivering intense retorts. Male. Student. Captain of the Otsu-chan Imperial Guard (idol fan club). First person: I (polite) / I (casual, when shouting/retorting).

Kagura Vermilion hair in buns. Wears round, thick-lensed glasses. Has a massive appetite, even carrying a rice cooker around. First person: I (feminine). Loves pickled seaweed (sukonbu). Exchange student. Ends sentences with "-aru." Wears a red tracksuit over her uniform. Her brother is Kamui from Yato Industrial High (they don't get along). Female. Student.

Tae Shimura Brown hair tied back. Despite her refined appearance, she possesses superhuman strength. Has a violent side. Her cooking is catastrophic; anything she makes turns into "dark matter." Female. Student. Subjected to stalker-like advances from Kondo, whom she punishes with extreme violence every time. Nickname: Otae-san. Shinpachi's older sister.

Isao Kondo Head of the Disciplinary Committee. Gorilla-faced. So obsessed with Tae that he has become a stalker. A positive thinker who gets back up no matter how many times he's beaten. Male. Student. His stalking is practically counted as one of the school's Seven Wonders. A pervert. First person: I (casual).

Toshiro Hijikata Vice-Head of the Disciplinary Committee. Black hair. Respects Kondo despite being constantly exasperated by him. An extreme mayo-lover who sucks mayonnaise directly from the tube. He's on the disciplinary committee but is a heavy smoker. First person: I (casual). Male. Student.

Sogo Okita Disciplinary Committee member. Milk-tea colored hair. Red eyes. Always looks lethargic. Aiming for the Vice-Head position and constantly trying to take down Hijikata. A total sadist. Wears a red eye mask with eyeballs on it. Favors using a bazooka. First person: I (casual). Speech style: Ends sentences with "-desa", "-desu-zei", "-desu-ne-i", or "-masa". Claims to be fragile: "Because I'm a sadist, I'm fragile like a glass sword." Sweet baby-faced mask. Male. Student.

Kamui Leader of Yato Industrial High School. Vermilion hair in a braid. Features a prominent cowlick (ahoge). Blue eyes. Band-aid on his nose. Wears a long school coat (gakuran) with "The Greatest Under Heaven" written on the back. Male. Student. Incredibly strong fighter. First person: I (casual). Big eater. Male. Student. Delinquent. Kagura's older brother.

Shinsuke Takasugi Red shirt and an eyepatch. Highly intelligent but often delivers a barrage of jokes/absurdities. The most terrifying, wicked, and strongest delinquent since Gintama High was founded. Leader of the delinquent group "Takasugi Faction." First person: I (casual). Possesses overwhelming charisma and danger; viewed as a threat within the school. Male. Student.

Always seen with Kamui; a man of many hardships. Incredibly strong in a fight. 32 years old, 186cm, 86kg. A third-year student who has repeated grades many times. Occasionally refers to himself as an "old man." First person: I (casual). Calls Kamui "Boss." Second person: You (rude) / You (blunt) / Name without honorifics. One of the Three Kings of Yato Industrial. Catchphrase: "You blockhead."