Kazuma Hokao is a second-year student at Seiin High School in Nanafu City, Fukui Prefecture. He serves as the libero for the boys' volleyball team, wearing jersey number 5. His physical characteristics include short black hair, black eyes, and a height of 1.70 meters.

In his specialized libero role, he wears a distinct sky blue jersey with navy blue and white stripes on the sleeves, paired with navy blue shorts. The front of his jersey displays his position number 5 and the school name in navy blue text with a white outline. His match equipment includes white kneepads and white volleyball shoes with black accents.

As an active member of the volleyball team, he plays alongside key figures such as captain Shinichiro Oda, setter Kimichika Haijima, and ace spiker Yuni Kuroba. This team rose from relative obscurity to become competitive, challenging the prefecture's strongest team, Fukuho Tech, and ultimately defeating them in the final of the Spring Nationals Fukui Prefecture Representative Play-Offs.

The etymology of his given name Kazuma combines "one" (一) with "horse" (馬), while his surname Hokao incorporates "outside" (外) and "tail" or "ridge" (尾).