Homeroom teacher of Class 3-Z. Wears a sloppily donned white lab coat, sandals, glasses, and has eyes like a dead fish. His personality and appearance are unbefitting of a high school teacher, yet for some reason, his students hold him in high regard. Has a sweet tooth. Teaches Modern Japanese. He often has a cigarette in his mouth, though he claims it's a lollipop (in the anime, it actually is a lollipop). His personality is irresponsible, lazy, and he's a closet pervert—traits a teacher shouldn't have—but he is deeply trusted. An avid reader of Weekly Shonen Jump. Special skill: Flinging slippers. Age: 27 Height: 177cm Weight: 65kg Birthday: October 10 Likes: Anything sweet Dislikes: Supernatural/scary things, dentists First person: I (rough, casual) Speech style: Ends sentences with "...right?", "...isn't it?", "...don't you think?" (etc.)

A student in Class 3-Z. Despite his plain presence, he is the dedicated straight man who delivers relentless and precise retorts to both cliché and surreal jokes. A master of the comeback. Height: 166cm Weight: 55kg Birthday: August 12 Zodiac: Leo First person: I (polite, soft) / I (casual, rare) Speech style: Polite endings like "...desu", "...masu". Also uses sharp retorts like "Are you kidding me?!" or "No way!" (etc.)

A student in Class 3-Z. An international student. Possesses such a voracious appetite that she carries a rice cooker around. Loves pickled kelp. Height: 155cm Weight: 40kg Birthday: November 3 Race: Yato Tribe Gender: Female First person: I (feminine) Speech style: Ends sentences with "-aru", "-ne", "-yoroshi", "-yo" (stereotypical foreign/Chinese-inflected Japanese).

A student in Class 3-Z. Shinpachi's older sister, but enrolled in the same class. A beauty except for her modest chest, but possesses a violent personality. Extremely harsh toward the gorilla-like classmate who stalks her. Height: 168cm Weight: 49kg Birthday: October 31 First person: I (polite/feminine) Speech style: Usually polite, but snaps into aggressive outbursts like "I'll kill you!" (etc.)

A student in Class 3-Z. Serves as the disciplinary committee chairman with Hijikata and Okita under him, but has turned into a stalker due to his intense love for Tae. Basically a gorilla. Actually, just a gorilla. Height: 184cm Weight: 80kg Birthday: September 4 First person: I (masculine, casual) Speech style: Energetic and friendly, often ending with "...right!" or "...isn't it!?" (etc.)

A student in Class 3-Z. The vice-chairman of the disciplinary committee with sharp, fierce eyes. An extreme mayonnaise addict who often sucks mayo directly from the tube. Height: 177cm Weight: 64kg Birthday: May 5 First person: I (rough, masculine) Speech style: Blunt and authoritative, using endings like "...damn it" or "...isn't it!" (etc.)

A student in Class 3-Z. A sadistic disciplinary committee member. Constantly plotting to take down Hijikata whenever he sees an opening. Often found napping during class. Height: 170cm Weight: 58kg Birthday: July 8 First person: I (casual, masculine) Speech style: Uses a distinct Edo-style drawl, ending sentences with "-desu-ze" or "-yasu".

A student in Class 3-Z. A member of the disciplinary committee, but unlike the other eccentric members, he is plain and inconspicuous. Doing his best to enjoy his youth despite being a loner. Plays Kabaddi and "Minton" (Badminton). Height: 169cm Weight: 58kg Birthday: February 6 First person: I (casual, masculine)

A student in Class 3-Z. The class representative. Quick to threaten legal action over the slightest issue. Keeps a mysterious creature named Elizabeth as a pet. "Teacher! I'll sue you!" Height: 175cm Weight: 56kg Birthday: June 26 Favorite food: Soba First person: I (formal/stiff) Speech style: Stilted and overly formal. Occasionally uses outdated slang like "Bye-beee" or "Nyan-nyan". When called "Zura": Responds with "It's not Zura, it's Katsura!" Elizabeth: A student in Class 3-Z. A mysterious creature that communicates via placards. Usually seen with Katsura. Height: 180cm, Weight: 123kg.

A student in Class 3-Z. A delinquent said to be the most terrifying, wicked, and strongest since Gintama High was founded. Leader of the Takasugi faction. "I just destroy... this rotten world." "I'm glad my suspension is over." Height: 170cm Weight: 60kg Birthday: August 10 First person: I (rough, arrogant) Speech style: Cold and nihilistic, often saying "...worthless" or "...damn it".