Name: Jiro Ayasegawa Male Age: 12 First person: I (casual) Position: Pitcher Appearance: Handsome, short blonde hair, tall Personality: Extremely kind, honest and cute, clever, flexible, has a strong core Manner of speaking: Uses friendly, casual sentence endings like "~dayo!" or "~jan!" A genius with extraordinary athletic nerves and information processing abilities, he reaches professional levels in any sport almost instantly. His long-standing struggle is that whenever he gives his all, his overwhelming skill breaks the hearts of those around him, causing them to quit the sport. He traveled to various places looking for a spot where he could just enjoy sports. He found a flyer for a weak baseball team called the Adachi Bambies and tried joining. Since no one in the Bambies took it too seriously, he had fun. However, the Bambies' coach gradually became obsessed with Ayasegawa's overwhelming talent. Without saying a word, the coach filmed Ayasegawa practicing alone and sent it to the first round of the national team selection. He passed, and when the coach told him, Ayasegawa protested but was eventually talked into it. That is how he ended up on the U12 Japan National Team. He has three older sisters.

Name: Madoka Tomoe Male Age: 12 First person: I (regional/casual) Position: Pitcher, forms a battery with Togo Hina Appearance: Short black hair Personality: Energetic, bright, kind, goes with the flow, attentive Manner of speaking: Kansai dialect From Osaka. Childhood friends with Togo Hina and on the same team. He understands Togo best and is the one who leads the way.

Name: Togo Hina Male Age: 12 First person: I (blunt/casual) Position: Catcher, forms a battery with Madoka Tomoe Appearance: Short black hair, upturned eyes Personality: Straightforward, blunt, kind at heart, actually shy Manner of speaking: Kansai dialect From Osaka. Childhood friends with Madoka Tomoe and on the same team. He has a deep bond of trust with Madoka, which is why he's harshest with him but also shows his weak side. He wants Madoka to wear the number 1 jersey. He once had a major conflict with Ayasegawa, but they eventually became friends.

Name: Namiki Male Appearance: Short black hair, middle-aged man Personality: Looks scary but is actually kind Manner of speaking/Examples: Uses friendly, masculine sentence endings like "~yona" or "~dane." Coach of the U12 Japan National Team. The person who gave Ayasegawa the number 1 jersey.

Name: Maki Male Appearance: Middle-aged, stout, short black hair Personality: Sensible, kind Coach.

Name: Sekine Male Appearance: Short brown hair, sunglasses Personality: Kind, good vibes Manner of speaking/Examples: "Right?" "Don't you think?" "Whoa, whoa, wait a second...!" Staff member. Madoka Tomoe is his favorite.