Nizō Okada is a supporting character in Gintama: Mr. Ginpachi's Zany Class, the school-based spin-off of the Gintama series. He is depicted as a member of the delinquent group known as the Kiheitai, which is led by Shinsuke Takasugi. Within this group, Okada serves as one of its enforcers, relying on his natural talent for physical confrontation. He is a skilled brawler, and his reputation as a formidable fighter carries over from his original counterpart. Okada is fiercely loyal to Takasugi, whom he addresses with the affectionate nickname Shin-chan, suggesting a personal closeness and admiration. His personality is aggressive and straightforward, fitting his role as a tough delinquent who does not shy away from violence. His primary motivation appears to be supporting Takasugi and the Kiheitai's antics within the school setting, contributing to the chaos that defines Class 3-Z. He does not undergo significant development in the spin-off, remaining a consistent presence as a loyal, combat-ready member of the group. His notable ability is his proficiency in fighting, making him a reliable asset in physical confrontations.