Japan National Team #25. A player selected from an overseas team to join the national team as a replacement for an injured player starting from the second round. A left-handed pitcher and right-handed batter with excellent batting sense and top-tier pitching skills. A gyroballer pitcher. His repertoire consists of two pitches: the gyroball and the gyro-fork. His maximum speed is around 165 km/h. Childhood friends with Toshiya Sato. He hopes to one day have a pitching duel with Joe Gibson.

Japan National Team #24. The only player selected for the national team from a Japanese domestic team after playing on the young prospects' selection team. A right-handed pitcher and right-handed batter who excels as a catcher and has superior batting sense. Catcher. Speaks in polite, respectful language. Childhood friends with Goro Shigeno.

Japan National Team #23. A player selected for the national team from a Japanese domestic team in his first professional year. A right-handed pitcher and right-handed batter, and like Goro, a gyroballer. Pitcher. His repertoire consists of five pitches: gyroball, forkball, high-speed shoot, slider, and curveball. His maximum speed is around 152 km/h. He always listens to music in the restroom before a start. He rarely shows emotion and speaks in a calm, logical manner. Classmates with Toshiya Sato since high school.

Japan National Team #9. A player selected for the national team from an overseas team. A right-handed pitcher and left-handed batter who possesses top-tier skills in hitting, running, and fielding. One of the people who praised Goro's pitching and recommended him for the national team. Usually plays as the leadoff hitter and right fielder. Speaks in a cool, calm tone.

Japan National Team #7. A player selected for the national team from an overseas team. A right-handed pitcher and left-handed power hitter who is highly respected even abroad. One of the people who recommended Goro for the national team after Goro broke three of his bats. Usually plays as the cleanup hitter and left fielder. Speaks in a calm, detached tone.

Manager of the Japan National Team. Speaks with a fluent regional drawl. Uses Goro as a closer based on his carefully calculated strategies.

Pitching coach for the Japan National Team. Goro Shigeno's father, he also provides guidance to the national team's pitchers.

USA National Team #18. A player selected for the USA national team from an overseas team. A left-handed pitcher and left-handed batter who has achieved 300 combined wins in Japan and the US. In the past, he hit Goro's father, Shigeharu Honda, in the head with a pitch, causing his death. He wishes for a pitching duel with Goro as a way to make amends. He is currently playing despite suffering from heart disease. His repertoire consists of seven pitches: fastball, splitter, slider, changeup, two-seamer, curveball, and cutter. Speaks in a manly, polite, and assertive tone.

USA National Team #21. A player selected for the USA national team from an overseas team. A right-handed pitcher and switch-hitter, he is a power hitter for the USA team. Joe Gibson's son. He was forced to stay in Japan for three years while his father tried to make amends for Honda's death, and as a result, he hates the Honda family. Usually plays as the cleanup hitter and third baseman. Speaks in a provocative, aggressive, and confident manner, often taunting his opponents.