Gakushuu is a male student at Nanyo Academy and one of its four strongest fighters, collectively called the "Big Four." He has a muscular physique, spiky black hair, and wears the Nanyo Academy uniform: a light brown vest, button-up shirt, and black pants. His personality blends a strong enthusiasm for combat with a sense of integrity. This moral compass is demonstrated when he intervenes to defend a stranger from harassment, coexisting with his enjoyment of fighting. In the manga's Introductory Arc, Gakushuu first challenges Hakufu Sonsaku, initially overpowering her until her latent muscle relaxant technique takes effect. Later, he effortlessly defeats multiple random fighters but is overwhelmed by Shimei Ryomou, who knocks him unconscious with a chokehold. During the Big Four Arc, he confronts Genpou Saji about behind-the-scenes manipulations, warning him that overconfidence leads to downfall. He remains involved in key events, including visiting the hospitalized Koukin Shuuyu to explain Hakufu’s situation. In the anime’s first season, Gakushuu’s early confrontation with Hakufu similarly sees him initially withstand her attacks before succumbing to delayed damage. He suffers significant arm injuries during his loss to Ryomou. He participates in the great fighters tournament, defeated early by an opponent using underhanded tactics. Later, he investigates Kouha Kannei’s suspicious behavior, leading to his capture by Saji. He is ultimately rescued during the cliff confrontation involving Hakufu and Ukitsu. During *Dragon Destiny* (season 2), Gakushuu defends Nanyo Academy during Kakouen’s assault, holding her off once he confirms Ryomou is no longer present. He participates in strategic discussions with the Big Four regarding Hakufu’s status as the "conqueror from the West" and Seito’s peace overtures. At the Battle of Red Cliffs, he fights Koumei Jokou, initially matching his strength before overpowering him by slamming him against a steel girder. He later appears working a part-time job, where he assaults a male customer for harassing a female patron, reaffirming his protective nature. Gakushuu’s development remains consistent across media, emphasizing his physical prowess and moral convictions without significant personal evolution. His role often supports broader narrative conflicts involving Nanyo’s leadership and external threats.