TV-Series
Description
Seishirō Inumine studies at Ayanagi Academy's Musical Department and belongs to Team Hiragi. He sports green hair and orange eyes, standing 185 cm tall. Born May 5th (Taurus), his blood type is O. His standard school uniform features a loose tie, untucked shirt, absent vest, and unbuttoned blazer. Training attire consists of a white zip hoodie with black trims, an orange shirt underneath, grey shorts, and white dancing shoes.

His personality mirrors a disobedient dog. Cheerful and friendly, he often loses awareness of his surroundings, especially when hunting for food. He bursts into spontaneous song regardless of context, a habit noted by teammates. Though generally amiable, behaviors like sudden disappearances during practice or academic tasks frustrate others. Team Hiragi deems him useless outside musical performances, despite acknowledging his talent there. He takes pride in his team and abilities but battles focus and practicality in daily life.

Academic hurdles plague him; he failed midterms and makeup exams twice, passing only when teachers conceded due to his performing arts grades. He struggles in most subjects except physical education and music. He remains unaware of his report book contents. Technology, machinery, and cooking baffle him. Uncontrolled strength causes accidental breakage, like shattering woodblocks in printing class. He discovered a clay allergy during sculpting and falls asleep sketching. Yet he maintains undefeated confidence in rock-paper-scissors.

His family operates the Bow-Wow House, a Chinese restaurant in Yokohama's Chinatown. He serves as its mascot, the "Shumai Dog," performing at events. This motif extends to Ayanagi's "Animal Park Series," where he embodies the Shumai Dog. Daily routines center on eating, sleeping, running, and singing, activities he uses to manage stress. Favorite foods include meat and nearby tapioca drinks. Off-days blend these interests, reflecting his simple approach.

Relationships within Team Hiragi define his role. Classmate, teammate, and roommate Akira Ugawa finds it hard to relax around his unpredictable actions. Izumi Toraishi frequently manages his disappearances, using commands or throwing shoes to enforce discipline—an interaction likened to master and dog. Shu Kuga observes Toraishi's challenges handling him. Despite tensions, Inumine participates fully in team performances like the duet "Sparkling Sparkle ☆" with Ugawa and the ensemble "Gift ~Curtain Call~."

Innate singing and dancing talents offset his other shortcomings. He performs at the Ayanagi Festival and participates in the Kao Council's "Opening Ceremony" program for future leadership candidates. His development involves navigating team challenges and performances without direct leader oversight, evident during festival preparations. His persistence in musical contexts endures, while academic and practical limitations remain consistent traits.

Trivia reveals his middle school nickname was "retriever." Eigo Sawatari claims his sixth sense for navigation exceeds map accuracy. Ugawa reports he sleeps with eyes open, grinds his teeth, and consumes rice balls while asleep. He famously broke through a wall at the Hiragi villa in Season 1, leaving a hole shaped like his silhouette—later patched with mismatched wood and referenced in Season 2. Alternate universes depict him as a chef ("April Fools Series") and a prisoner ("IF Series" postcards).