Gakushū, a student at Nanyo Academy, ranks among its elite Big Four fighters. His muscular physique, spiky black hair, and school uniform—a light brown vest over a button-up shirt with black pants—define his appearance. He thrives on combat yet displays unwavering integrity, exemplified when defending a female customer from harassment at his workplace, an act risking his dismissal.

In early confrontations, he challenges Hakufu Sonsaku, initially dominating by hurling her against a wall after absorbing her kick, but falls victim to her hidden muscle relaxant technique. Later, he defeats multiple random fighters only to be swiftly subdued by Shimei Ryomou's choke hold. During the Big Four Arc, he confronts Genpou Saji about manipulative schemes, warning of overconfidence's consequences, and updates the hospitalized Koukin post-Saji's actions.

Within Hakufu's Broken Spirit Arc, Gakushū questions Saji on a rooftop about Ryomou's improbable victory, dismissing possession claims as a fluke. The anime adaptation shows him informing Koukin and Hakufu of mandatory Great Fighters Tournament participation. Competing in its first match, he loses to underhanded tactics. Suspecting Kouha Kannei's meeting with Enjutsu, he follows to a boiler room but is knocked out by Saji. Restrained alongside Koukin during Saji's plan reveal, he is later chained at a cliff until Hakufu and Ryomou intervene. Post-conflict, he aids in preventing Saji's suicide.

In the Dragon Destiny narrative, Gakushū halts Kakouen's assault on Nanyo after noting Ryomou's absence. He attends a Big Four meeting where Saji exposes Seito's provocation of Kyosho. At the Battle of Red Cliffs, he duels Koumei Jokou, overpowering him by slamming him against a steel girder after an even start, then observes Hakufu and Gentoku's clash with Moutoku Sousou.

No concrete information details Gakushū's appearances or development in Shin Ikkitousen or newer media like OVAs or spin-offs.