Keita Higashidani is a first-year student at Shinden Middle School who serves as a supportive presence within his circle of friends. He has known his classmates Gou and Sawaguchi for a considerable length of time, and the three of them are frequently seen acting together as a group. Keita is characterized by his role as an arbiter and peacekeeper among his more volatile peers. When tensions arise between the pitcher Takumi and the catcher Gou, who often clash due to their strong personalities, Keita steps in to mediate their conflicts. He is attentive to both sides of an argument and makes a conscious effort to care for their individual feelings and maintain the harmony of their relationships. In the story, this makes him an essential emotional anchor for the group, providing a calming influence that helps balance the intense dynamics of the other characters. Physically, Keita is a teenage boy with black eyes and chin-length black hair. His primary ability lies not in athletic skill but in his interpersonal sensitivity and level-headedness, which he uses to navigate and defuse the friction between his friends.