Satomi Anzaki serves as manager for Mizuho High's boys' basketball team. She previously played point guard for her junior high school's girls' basketball team until a leg injury ended her playing career. This injury prompted her shift into a managerial role, where she applies her basketball knowledge and experience. She designs comprehensive training programs for the team, with her expertise recognized as surpassing other knowledgeable figures in the series. Anzaki maintains long-standing connections with key team members Takumi Fujiwara and Ranmaru Miura, dating back to their junior high school days. She also shares a close friendship with Tōya Takashina.