Gender: Male A master catcher once feared as the "Master Strategist." Currently suffering from amnesia, he has become a goofball who constantly cracks jokes like "Paipoge." Alias: Master Strategist (Pre-amnesia) Features: Formerly a calm and collected master catcher, but now a jokester who spouts gags like "Paipoge" due to memory loss. However, his "Master Strategist" personality occasionally resurfaces during games. Personality: A natural-born goofball and idiot. He has no interest in baseball and constantly makes crude jokes (Paipoge). He is a coward and weak under pressure, but he is actually the mood maker who wishes more than anyone to "enjoy baseball with his current teammates."

Gender: Male A genius pitcher boasting overwhelming ball speed. He has absolute faith in Kei and is obsessed with playing baseball with him. A genius pitcher with a powerful arm capable of exceeding 140km/h. Kei's childhood friend, he is pathologically obsessed with playing baseball with him. A natural airhead who speaks very little and is indifferent to anything other than baseball. Personality: "A toddler in everything but baseball." He is extremely taciturn, with almost zero communication skills. He is abnormally attached to Kei, possessing a heavy sense of dependence (obsession) to the point where he cannot play baseball without him.

Gender: Male The conscience of the team, serving as the straight man who shares the reader's perspective. A catcher/first baseman with solid skills despite his plainness. The team's coordinator and the only sane person. While not a standout genius, he supports the team with steady play and sharp retorts. He is trusted by readers who say, "Kotesashi would collapse without him." Personality: A "saint" and a "hard worker." Surrounded by geniuses with overwhelming personalities, he is a kind soul who spends his time reacting to their antics and following up for them. While understanding his own limits as an ordinary person, he is the "backbone of the team" who keeps the geniuses connected as human beings.

Gender: Male A powerful-hitting shortstop. He suffered from the yips but resumed baseball at Kotesashi. A shortstop with a strong arm and heavy hitting. Despite his flashy appearance, he is a very stoic and hard worker. He suffered from the yips due to the trauma of losing to the Kiyomine-Kaname battery in the past. Personality: "A hot-blooded and stoic big brother figure." He looks like a flashy delinquent, but he is actually the most sensible member and cares deeply for his family. Having suffered from the yips, he is sensitive to the pain and weaknesses of others and excels at inspiring his teammates.

Gender: Male A fast-footed, skilled-hitting second baseman. A theorist with a unique view of baseball. A second baseman known for his speed and technical hitting. He is a theorist with a strong obsession with technique, and at one point quit baseball after feeling he had reached his limits. His middle-infield partnership with Todo is among the best in the series. Personality: "Extreme theorist and cynic." The type who fights with data and logic rather than trusting his own intuition. He is proud and sometimes mocks others for their low skill levels, but he has a delicate side, secretly fearing the "limits of his own talent" more than anyone.

Gender: Male A sincere and serious genius batter. He suffered a complete defeat against Kiyomine and Kaname in middle school and eagerly awaits a rematch.

Gender: Male A left-handed ace who manipulates a variety of breaking balls. A baseball scholarship student with an aloof personality who speaks with a regional drawl.