Sachiko Nishio

Daughter of Coach Nishio, and manager for the Meisei High team. She befriends Minami, and encourages her to also become a team manager. She is the girlfriend of Meisei's former ace, Kuroki, and both she and he see prospective talent in Kazuya's older brother, Tatsuya, and they try to recruit him to the baseball team.

(Source: Wikipedia)