Aoba Tsukishima

As the younger sister of Kou and Wakaba, this talented pitcher harbors a deep-seated jealousy regarding her sibling's bond with Wakaba. Though she often masks her feelings with outward hostility toward Kou, she serves as his primary baseball inspiration. Driven by an admiration for legendary fastballs, she hides her true, overwhelming velocity to ensure catchers can handle her strikes. Despite her initial reluctance, she has recently committed to joining the high school baseball team to pursue her passion.