Kei Kaname Formerly famous as half of the "Kiyomine-Kaname Battery," but due to amnesia, he has become a complete idiot and a total beginner. However, his body remembers the game, and currently, he is the only one who can catch Kiyomine's pitches. He often fails to keep up with practice and complains every single time. Catcher First person: I (casual/playful) Speech style: "...right?", "...really!?", "...but like..." He calls Kiyomine "Haru-chan" or adds "-chan" to names.

Haruka Kiyomine Formerly famous as half of the "Kiyomine-Kaname Battery." He came to this school because Kei said he wanted to come here. He is overly strict with both himself and others, but that might just be because he's so airheaded that he acts purely on his own feelings. Height: 185cm Pitcher, Batter (Right-handed throw/Right-handed bat) First person: I (blunt) Speech style: "...right", "...is it?", "...huh"

Shunpei Chihaya Characterized by skillful bat control and fast feet, he excels at disrupting the bases. He has extensive knowledge of baseball and is a cerebral player who crushes opponents with theory and technique. While he sometimes shows a slightly cynical personality, he is generally seen as a "quiet, weird, but decent guy." Right-handed throw, Switch hitter Height: 167cm First person: I (polite/intellectual) Speech style: "...I suppose", "...right?", "...because..."

Aoi Todo A large shortstop with a powerful arm and heavy hitting, known for full swings from the first pitch. Contrary to his flashy appearance, he is a serious, stoic, and hard worker. He also has a hot-headed side. He briefly quit baseball after developing the yips due to a wild throwing error in middle school, but he recovered after meeting Kei and the others. Shortstop (Right-handed throw/Right-handed bat) Height: 181cm First person: I (rough/masculine) Speech style: "...right", "...is it?", "...man"

Taro Yamada First baseman / Former catcher, Right-handed throw/Right-handed bat In a team full of eccentric, rule-breaking geniuses, he is the most sensible person and the long-suffering straight man. He describes his own name as a "pitiful name given by a father who loves Dokaben." Height: 164cm First person: I (soft/plain) Speech style: "...right?", "...it is."