Mariya Saijou

As a classmate of Takeo, this energetic girl forms a unique bond with him after undergoing rigorous training for an upcoming school sports day relay. Deeply impressed by his coaching abilities, she adopts the respectful nickname "shishou" to acknowledge him as her mentor. This playful dynamic highlights her developing admiration for his strength and dedication, turning a simple athletic endeavor into the foundation of their special teacher-student relationship.