Sho Doigaki is a member of the Meikun High School baseball team, serving as both catcher and first baseman. He belongs to a younger cohort within the team structure, distinct from the core Yamada generation. Doigaki participates throughout the team's high school baseball endeavors, primarily anchoring defensive roles behind the plate and at first base. As the narrative progresses from middle school to high school, he integrates into the Meikun High team dynamics. His role remains defined by this dual-position participation during the depicted baseball activities.