Taichi Nanao, an exuberant high school student driven by an unrelenting quest for popularity, sports striking red-dyed hair with black highlights, multiple ear piercings, and a hip-hop-inspired wardrobe of layered streetwear and oversized accessories. His dorm partnership with Omi Fushimi, dubbed "Big and Small Roomies," humorously underscores their contrasting builds. Craving validation since childhood acting gigs brought fleeting fame, Taichi cycled through attention-grabbing hobbies like yo-yo stunts before joining the theater troupe to boost his social standing—a plan that frequently unravels when he latches onto passing fads. His thirst for acclaim culminated in betraying the Autumn Troupe as a spy for rivals God Troupe, though remorse soon led to tearful reconciliation.

Bounding with puppyish enthusiasm, Taichi masks insecurities behind comedic bravado, secretly measuring himself against accomplished peers like Banri Settsu and Juza Hyodo. He seeks guidance from pragmatic Omi when clashing with disciplinarians like Sakyo Furuichi, while rehearsal mishaps and melodramatic protests over tragic roles expose his endearing scatterbrain tendencies. Through hard-won growth, he evolves from chasing spotlights to cherishing troupe bonds, finding pride in mastered sewing techniques and vocal admiration for Banri’s adaptability and Juza’s grit. His softhearted nostalgia—treasuring a childhood love confession—adds unexpected depth to the troupe’s rugged aesthetic.

Dubbed Akapoyo-kun for his fiery locks, Taichi forms the "Puppy Pair" with equally vivacious Kazunari Miyoshi. As an Ouka High student sharing classes with Tenma Sumeragi and Juza, his social ties extend beyond the stage.