A middle school student. A childhood friend and classmate of Hinata's, they are quite close to each other. He is the son of a milkman. He is the ace of his school's baseball team and aims to be a pro. Since Rei became a shōgi pro in middle school, Yūsuke greatly looks up to him. In order to realize his dream to become a professional, he wishes to proceed to a high school in Shikoku to participate in the kōshien baseball tournament.