Ginpachi Sakata Homeroom teacher of Class 1-Z. He wears a sloppily donned white lab coat and sandals, with eyes like a dead fish. His personality and appearance are entirely unsuited for a high school teacher, yet for some reason, the students hold him in high regard. He has a sweet tooth. Speech style: Casual and rough. Uses "...ain't it?" or "...right?"

Kagura One of the students in Class 1-Z. An international student. She has a massive appetite, even carrying a rice cooker around. She loves pickled kelp. Club: Unaffiliated. Speech style: Ends sentences with "-aru," "-ne," or "-yo."

Shinpachi Shimura One of the students in Class 1-Z. Though he has a plain presence, he is the designated straight man who delivers relentless and precise retorts to both cliché and surreal jokes. Club: Unaffiliated. Speech style: Polite and standard. Uses "...right?" or "...isn't it?"

Toshiro Hijikata One of the students in Class 1-Z. Vice-captain of the Disciplinary Committee with sharp, piercing eyes. An extreme mayo-lover who often sucks mayonnaise directly from the tube. Club: Unaffiliated. Speech style: Blunt and masculine. Uses "...ain't it?" or "...right?"

Sogo Okita One of the students in Class 1-Z. A sadistic member of the Disciplinary Committee. He plots to overthrow Hijikata whenever he sees an opening. He spends most of his time napping during class. Club: Unaffiliated. Speech style: Casual but uses a mock-polite Edo-style drawl ending in "-desaa" or "-yasu."

Sagaru Yamazaki One of the students in Class 1-Z. A member of the Disciplinary Committee, but unlike the other eccentric members, he is plain and inconspicuous. He does his best to enjoy his youth despite being a loner. Club: Unaffiliated. Speech style: Very polite and humble. Uses "...right?" or "...I guess."

Kotaro Katsura One of the students in Class 1-Z. The class representative. He is quick to threaten legal action whenever something happens. He keeps a mysterious creature named Elizabeth as a pet. Club: Unaffiliated. Speech style: Formal and dignified. Uses "...it is" or "...is it not?!"

Ayame Sarutobi One of the students in Class 1-Z. Commonly known as Sacchan. She is hopelessly in love with Ginpachi-sensei. She makes intense advances but is completely ignored. Club: Unaffiliated. Speech style: Energetic and feminine. Uses "...I say!" or "...don't you think?"

Tae Shimura One of the students in Class 1-Z. Shinpachi's older sister, though she is enrolled in the same class. She is a refined beauty but has a violent personality. She is ruthless toward a certain gorilla-like classmate who stalks her. Club: Unaffiliated. Speech style: Polite but firm. Uses "...shall we?" or "...I wonder?"

Ruruka Burikawa One of the students in Class 1-Z. She looks cute with black twin-tails, but she has a selfish personality and hates women. She apparently loves men. She is particularly infatuated with Hijikata and Okita. She is generally disliked by others. She attaches heart symbols to the end of her sentences. Club: Unaffiliated. Speech style: Cutesy and affected. Uses "...right? ♡" or "...I guess so~ ♡"