Gender: Male. School: Kotesashi High School, 1st Year (16 years old) Position/Number: Catcher / #2 Appearance/Hair: Sharp and handsome / Blond Personality: Swings between an idiot and a mastermind. The idiot side is sly, while the mastermind side is arrogant. Features: Lost his memory, but his body remembers baseball. Playful tone. Frequently makes gags and jokes. Gives teammates and close friends funny nicknames. Past: A genius who struck fear into batters during middle school.

Gender: Male. School: Kotesashi High School, 1st Year (16 years old) Position/Number: Pitcher / #1 Appearance/Hair: 185cm clean-cut cool beauty / Blue-black Personality: A blunt baseball idiot. Features: Abnormally obsessed with Kei. Silently accepts any of Kei's pranks. A monster pitcher. Past: Crushed the spirits of countless prospects.

Gender: Male. School: Kotesashi High School, 1st Year (16 years old) Position/Number: 1st Baseman / #3 Appearance/Hair: Gentle, plain, and friendly / Auburn Personality: Mild-mannered and kind. Features: The ultimate 'straight man' of the series who holds the eccentric geniuses together. Used to be a catcher. Past: Quit baseball after seeing the wall of genius.

Gender: Male. School: Kotesashi High School, 1st Year (16 years old) Position/Number: Shortstop / #6 Appearance/Hair: Rugged, hot-blooded build / Light green hair Personality: Short-tempered but diligent (Tsundere). Features: A siscon who handles all the housework. A batter who overcame his trauma. Past: Suffered from the yips after losing to the Haruka-Kei battery.

Gender: Male. School: Kotesashi High School, 1st Year (16 years old) Position/Number: 2nd Baseman / #4 Appearance/Hair: Sharp bob style, intellectual with glasses / Red Personality: A prickly, cynical speaker. Features: The brain of the team who moves based on theory and calculation. Uses polite speech with everyone. Very fast runner. Past: Lost to the Haruka-Kei battery and fell into despair after hitting the wall of physical limits and talent.

Gender: Male. School: Kotesashi High School, 2nd Year (17 years old) Position/Number: Center Fielder / #8 Appearance/Hair: Slim build with bangs covering his left eye / Purple Personality: Very weak-willed and timid (has an otaku streak regarding baseball). Features: Incredible speed that rivals Chihaya. Worships Mastermind Kei as "Kei-sama." Past: Ran away after being burned by the rigid, old-fashioned hierarchy of his previous baseball club.

Name: Sako Yusuke: • Gender: Male • School: Kotesashi High School, 3rd Year (18 years old) • Number: #10 • Position: Outfielder (Center Fielder) • Acts as the captain leading the members. Initially unmotivated, but becomes serious about building the club after being inspired by the 1st years' overwhelming skill and passion. Name: Ishikawa Gota: • Gender: Male • School: Kotesashi High School, 3rd Year (18 years old) • Number: Handed over the ace number (#1) when monster pitcher Kiyomine Haruka joined. • Position: Pitcher / Outfielder • One of the few pitching resources, but mainly plays outfield after Haruka joins. A steady, reliable personality who anchors the team.

Gender: Male. School: Teitoku High School (Top-ranked prestigious school in West Tokyo) Age: 16 (1st Year) Position: Outfielder / 1st Baseman Number: #9 Appearance: Neat black short cut, handsome features. Solid build over 180cm. Personality: Extremely serious and upright to the point where jokes don't work. Trusted by both seniors and juniors. Features: The cleanup hitter of a powerhouse school despite being a 1st year. Feels shock and anger at the sight of Kei making low-brow jokes after losing his memory. Past: After a crushing defeat by the Kiyomine-Kaname battery in middle school, he worked bloodily hard to surpass them.

Gender: Male School: Hikawa High School (Private) Age: 18 (3rd Year) Position: Pitcher Number: #1 Appearance: White hair with a blue tint, blue eyes, chic hairstyle covering one eye. Personality: Looks cool on the outside but is actually sly. A 'haraguro' type who relentlessly teases juniors with baseball gags and pranks. Features: Speaks in a thick Kansai dialect. Hikawa's left-handed ace whose main weapons are sharp breaking balls and control. Has low self-esteem and longs for a dedicated catcher who can lead him perfectly.

Gender: Male School: Hikawa High School (Private) Age: 16 (1st Year) Position: Pitcher Number: #14 Appearance: Massive 183cm frame with bulging muscles. Wild impression with a short black buzz cut. Personality: A simple-minded, hot-blooded idiot with a short fuse. Features: A power pitcher who trusts instinct over theory and blindly throws fastballs. Was teammates with Kotesashi's Chihaya Shunpei in middle school.