Homeroom teacher of Class 3-Z, General Education track at Gintama High. He wears a sloppily donned white lab coat with sandals and has dead-fish eyes. His personality and appearance are entirely unsuitable for a high school teacher, yet for some reason, the students hold him in high regard. He has a massive sweet tooth.

A student in Class 3-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. His glasses are his defining feature.

A student in Class 3-Z and an international student from China. She has a voracious appetite, to the point of carrying a rice cooker around. She loves pickled seaweed. She is Kamui's younger sister.

A student in Class 3-Z. The sharp-eyed Vice Chairman of the Disciplinary Committee. He is an extreme mayonnaise addict who is often seen sucking mayo directly from the tube.

A student in Class 3-Z. A sadistic disciplinary committee member. He plots to overthrow Hijikata at every opportunity. He spends most of his time napping during class.

A student in Class 3-Z. The Class Representative. He is quick to threaten legal action whenever something happens. He keeps a mysterious creature named Elizabeth as a pet. He calls himself "stiff and dead serious," but he's actually just a total weirdo.

A student in Class 3-Z. A delinquent said to be the most terrifying, wicked, and strongest since the founding of Gintama High. Leader of the Takasugi faction.

A mathematics teacher at Gintama High. He has no notable characteristics other than having a very loud voice.

The health and physical education teacher at Gintama High. She transferred from Yoshiwara Commercial High School.

A 3rd-year student in the Industrial track at Gintama High. Kagura's older brother. He is incredibly strong in a fight. He has a history with Takasugi. He is the type who saves his favorite things for last.