Yoshikawa is a clumsy and shy girl. She finds most of the players in the Baseball team to be intimidating but she admires the entire team

Cheerful and sociable person. We see him keeping Raichi in control and also supporting the entire team in an easy manner. Sanada is highly respected by his teammates and you can even say they are his fans

Furuya Satoru is a former Ace of Seido’s Baseball Team, from the Fall Tournament of his 1st year till the Spring Tournament of his 2nd year. Not a wolf but Polar Bear

Miyuki is famous for his aggressive game-play and is nationally known. Takashima Rei scouted him when he was in his first year of Junior High School

Takigawa Chris Yuu is a retired Seidou Baseball team catcher. He was in his third year when Eijun joined the team. Chris received the role of manager, after his shoulder injury, to guide the team. Takigawa Chris is a handsome boy with brown eyes. In his years at Seidou, his

Todoroki Raichi is the third baseman and the fourth batter of Yakushi High School. He also plays as a pitcher later in the series

Kominato Haruichi has pink hair and pink eyes. Though his eyes are mostly covered y his bangs which he cuts in Act II after their match with Komadai. He has a small stature with a calm and quiet personality.

Sawamura Eijun, starting with jersey No. 20 and now the ‘Ace’ of Seidou High, is the protagonist of Ace of Diamond. He is a southpaw pitcher who came to Seidou High from Nagano. He is a loudmouth and hotheaded boy with brown eyes which shines golden at the intense moment,