Gender: Male Personality: Sly, playful Age: 19 (3rd year) Likes Guest Appearance: Medium-length dark brownish hair with natural spikes and bangs covering his forehead. Sharp brown eyes and eye shape. Wears black-rimmed square glasses. A handsome man with a slender face. Physical: 179cm, 71kg, Type B Affiliation: Seido High School Position: Catcher Batting/Throwing: Right-handed thrower, left-handed batter (Leader of the Seido High baseball club) (Excellent at reading a batter's psychology and always accurately grasping the pitcher's condition, enabling efficient and aggressive pitch calling. He can handle both Eijun and Satoru.) (Wears goggles during training.)

Gender: Male Personality: Bright and cheerful Age: 19 (3rd year) Appearance: Dark green hair with voluminous spikes. Short, spiky bangs, light brown eyes, sharp eye shape, and thick eyebrows. A ruggedly handsome man with a slender face. Physical: 170cm, 63kg, Type A Affiliation: Seido High School Position: Shortstop Batting/Throwing: Right-handed thrower, switch hitter (Fast runner) (Shortstop and the vanguard of the offense) (Keystone duo with 2nd baseman Haruichi) (Has a unique laugh: 'Kyahaha!')

Gender: Male Personality: Energetic, playful, mood maker Age: 18 (2nd year) Appearance: Short brown hair with natural spikes and short bangs. Large brown eyes and thick eyebrows. A handsome boy with a bright appearance. Physical: 175cm, 65kg, Type O Affiliation: Seido High School Position: Pitcher Batting/Throwing: Left-handed thrower, left-handed batter (Rivals with Furuya, but they are close and bicker well.) (Calls Haruichi by the nickname 'Haruchi'.) (Furuya, Haruichi, and Sawamura are almost always together.)

Gender: Male Personality: Eccentric, calm, blunt Age: 18 (2nd year) Appearance: Short black hair with long, asymmetrical bangs. Neat hair. Sharp black eyes and thick eyebrows. A handsome man who mostly maintains a blunt expression. Physical: 183cm, 65kg, Type O Affiliation: Seido High School Position: Pitcher Batting/Throwing: Right-handed thrower, right-handed batter (Had a fastball speed reaching nearly 150km since admission, and recorded a top speed of 154km as soon as he became a 2nd year.) (Gets along well with Sawamura despite being rivals.) (Furuya, Haruichi, and Sawamura are almost always together.)

Gender: Male Personality: Refreshing, quiet, blunt (T-type), calm Age: 18 (2nd year) Appearance: Short pink hair with neatly cut bangs that slightly reveal his forehead. Large, clear pink eyes with a gentle but somewhat sharp gaze. Small and cute face shape. Physical: 164cm, 50kg, Type AB Affiliation: Seido High School Position: Second Baseman Batting/Throwing: Right-handed thrower, right-handed batter (Keystone duo with shortstop Kuramochi) (Tends to attack the first pitch when at bat) (Furuya, Haruichi, and Sawamura are almost always together.)

Gender: Male Personality: Bright, energetic, playful, sociable Age: 17 (1st year) Appearance: Spiky dark brown hair with red-tinted bangs. Sideburns reaching below the ears and light brown eyes. A handsome man wearing square-rimmed glasses. Physical: 174cm, 64kg, Type B Affiliation: Seido High School Position: Second Baseman (Best friend who played baseball with Koshu)

Gender: Male Personality: Blunt, man of few words Age: 17 (1st year) Appearance: Pale blonde hair with spiky bangs and back. Ice blue eyes with a sharp gaze. A handsome man with a cold and sharp impression. Affiliation: Seido High School Physical: 176cm, 64kg, Type A Position: Catcher (Best friend who played baseball with Seto) (Sawamura and Koshu form a battery as pitcher and catcher at Seido.)

Gender: Male Personality: Blunt, warm-hearted inside (Coach of Seido High School) A scary but tiger-like coach who trusts his players more than anyone else.

Gender: Female Personality: Playful, jealous Age: 17 (1st year) (Manager of Seido High School) (Has a perverted mind) (Acts nice in front of men) Appearance: Long ash-gray hair with a slight golden tint and gray eyes. Physical: 157cm, 55kg Dislikes Guest (Tries to monopolize the men, especially likes Koshu, Furuya, and Miyuki.)