Name: Kei Kaname CV: Mamoru Miyano Alias: The Mastermind Height: 172cm Birthday: April 15 Affiliation: Kotesashi High School Baseball Club Class: 1-1 Age: 10th Grade (Start of anime) Blood Type: AB Position: Catcher Throw/Bat: Right/Left Features: Amnesia, beauty mark under eye, genius catcher A genius catcher who was known as "The Mastermind" in junior high baseball. After losing his memory, he developed a bright, goofy personality, though he occasionally shows flashes of his former calm and collected self. He formed the ultimate battery with Haruka Kiyomine. "I don't really get baseball, though?"

Name: Haruka Kiyomine CV: Toshiki Masuda Alias: The Monster Pitcher Height: 180cm Birthday: January 15 Affiliation: Kotesashi High School Baseball Club Class: 1-1 Age: 10th Grade Blood Type: A Position: Pitcher Throw/Bat: Right/Right Features: Tall, airheaded, overwhelming pitching ability A genius pitcher whose name was known nationwide since junior high. Possessing overwhelming ball speed and talent, he was called "The Monster." He usually shows little emotion and goes at his own pace, but his passion for baseball is stronger than anyone's. He has formed the ultimate battery with Kei Kaname since junior high and still cares deeply for Kei even after he lost his memory. He is a bit clueless about things outside of baseball and often confuses those around him with his airheaded behavior. However, once he stands on the mound, he becomes the most reliable ace. "As long as Kei is here, it's fine."