Shion Asuma is a second-year student at Megurogawa Academy, sharing classes with Nagi Umino. He possesses light orange hair, frequently noted as auburn, and golden or hazel eyes, typically dressed in the standard school uniform. Exhibiting a carefree and jovial nature, Shion speaks openly and readily inserts himself into social situations, even with acquaintances. This outgoing and sometimes flirtatious behavior leads underclassmen to label him a "playboy," though not maliciously. His primary drive is seeking proximity to Erika Amano, whom he admires. He often attempts to orchestrate situations pairing Nagi Umino with Hiro Segawa, creating opportunities for himself to interact with Erika. Hailing from a prominent family, Shion is the heir to the Asuma school of traditional Japanese dance. This background grants him recognition among Megurogawa students for his family's status, yet his involvement in school activities focuses more on social interactions than overt displays of his heritage. A significant rumor once circulated claiming Shion was engaged to Hiro Segawa. Hiro herself later revealed this was untrue, causing brief confusion among peers after a school festival. Shion's confirmed family distinction remains solely his role as heir to the dance school, separate from the engagement speculation. During a school field trip, Shion actively joined a group containing Nagi, Erika, and Hiro despite limited prior closeness. He expressed enthusiasm about accompanying Erika and volunteered as her photographer throughout the trip. His satisfaction stemmed simply from being near her, underscoring his persistent yet unobtrusive interest.