Nagai Light is a genius boy with an exceptional sense of music, having swept the guitar, piano, and drum categories at the Next Musician World Competition. He serves as the oyakata, or coach, of a jarikishin, a type of evil god, and initially stands as a rival to the protagonist Dai Mugen and his partner Goutetsu. Light is driven by a desire for strength and carries unresolved feelings about his past, which fuel his competitive spirit. He is confident and highly skilled, often appearing calm and composed, but his pursuit of power sometimes leads him into conflict with his own values. Throughout the story, his encounters with Dai challenge his mindset, and he gradually begins to question his path, eventually developing a mutual respect with Dai. His relationship with his own god, Byuuga, is central to his role in kamizumo, the god-sumo battles, and together they form a formidable team. Light's notable abilities include his extraordinary rhythm and musical talent, which he channels into playing the god drum to empower Byuuga during matches. His growth involves learning that true strength may come from connection rather than isolation.