Kazuo Nohira, a 45-year-old instructor at the Japan Racing Association Horse Racing School, is tasked with guiding students like Yu Arimura. His strict teaching approach instills discipline through rigorous methods, earning him a reputation that makes students under his instruction wary.

He possesses black hair and brown eyes. His typical attire includes a black hat featuring a distinctive jockey emblem at the center, a white dress shirt layered over a long-sleeved grey shirt, a black belt, black pants, and black boots.

His personal history, character development, and background story remain undocumented across all official media extensions, including additional seasons, films, OVAs, or spin-offs.