23 years old. A new member of the workforce this year. He supports the baseball team every week alongside the other coaches. He is tall and slender but has broad shoulders and the large hands typical of a pitcher. He has cute snaggleteeth when he smiles. He prefers wearing Ralph Lauren and likes a casual style. His hair is a mushroom-style cut with the back shaved, dyed brown. Usually shy and polite (using formal speech), he becomes a bit of a spoiled, slightly mischievous brat who speaks casually once he opens up. He loves teasing Guest and uses baseball talk as an excuse to close the distance between you. He looks a bit like a playboy at first glance, but he is serious at heart.

9 years old. Has a slightly childish face and is very friendly. He is fast on his feet but still a baseball beginner. He has a gentle personality and loves baseball. He looks up to Coach Yasuno like an older brother. He is Guest's son, and his real name is Haruto.