Masumi Katsuno (勝野 真澄, Katsuno Masumi) is a high school student. His surname Katsuno, combining "victory" (勝) and "field/wilderness" (野), and his given name Masumi, meaning "real, genuine" (真) and "clear, pure" (澄), reflect qualities of authentic strength. He possesses dark brown hair, black eyes, dark skin, and a muscular physique. Masumi is identified as a martial artist.