Kinzo Abashiri is a first-year student in Miss Machiko's class at Arama Academy. He forms one-third of a close-knit trio alongside Kenta Ikegami, the primary instigator of mischief, and Kame. Kinzo possesses a noticeably heavier physique than his friends, a trait consistently highlighted in his character descriptions.

This trio is known for disruptive classroom antics and pranks, frequently targeting their teacher, Miss Machiko. While Kinzo actively participates in these schemes, including attempts to disrobe or embarrass her, he is generally portrayed as less extreme than Kenta. His involvement typically stems from the group dynamic rather than being the primary instigator.

A defining aspect of Kinzo is his passion for wrestling; he actively expresses a desire to pursue a future career as a professional wrestler. While contributing to the group's rowdy behavior, his personality is not depicted as overtly aggressive like some peers, such as Genchiki. Within the classroom's social structure, Kinzo represents the more physically imposing but less academically inclined students.