Ryūsei Kumada, a bear spirit and former third-year student at Kunpō High School, is marked by a cross-shaped scar over his left eye. Initially leading the school’s delinquent group, he ceded his position to Omi Kiriyama before graduating. He later adopted the name Suisei Kumada and re-enrolled as a first-year student, symbolizing a deliberate reset of his academic journey.

The name Ryūsei, meaning "meteor," aligns with his brief but impactful role as a transient figure, while Suisei, meaning "comet," signifies a cyclical resurgence. His surname Kumada merges "bear" and "rice paddy," echoing his bear spirit heritage.

Physically, he sports facial hair and a stoic demeanor, though specifics of his personality and past remain unrecorded. His transition from delinquent leader to restarting high school hints at a narrative of reinvention, though the motivations behind this shift are unexplored. Existing sources lack details on his abilities, relationships, or broader narrative involvements.