
The Ball-Chinned Kid is the grandson of Agoni, the multimillionaire who founded the Hero Association. Best remembered for the deep cleft splitting his chin, he is the boy Saitama rescued from the monster Crablante three years before the story begins, in an encounter that helped set the hero's path in motion.
The boy's most striking feature is by far the huge cleft dividing his chin. Otherwise he is a small child with short black hair, dressed in a white T-shirt, orange shorts, and blue sneakers.
He has a playful, troublemaking streak, having once scribbled on the sleeping Crablante with a permanent marker while the monster napped in a park. He can also be scatterbrained, fretting over his lost ball even as his life hangs in the balance.
Saitama first crosses paths with the boy while he plays soccer in a park. After learning that Crablante is hunting the child, Saitama starts to walk off, figuring the matter is none of his concern, but he turns back when the crab monster lunges and battles the creature to save the boy. In a bonus page set later, the kid reappears as a school student, watching Sneck lie defeated on the ground after failing to crush Saitama.

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The boy with the distinctive cleft chin is the Ball-Chinned Kid, the grandson of Agoni, the multimillionaire who founded the Hero Association. He is the child Saitama rescued from the monster Crablante three years before the story begins.
Saitama first encounters the Ball-Chinned Kid while the boy plays soccer in a park, then turns back to fight off the monster Crablante after learning it is hunting the child.
The Ball-Chinned Kid is a small boy with short black hair, best known for the deep cleft splitting his chin, and he dresses in a white T-shirt, orange shorts, and blue sneakers.
Saitama's rescue of the Ball-Chinned Kid from Crablante is an early encounter that helped set the hero on his path, even though Saitama initially considered walking away before the monster attacked.
The Ball-Chinned Kid's grandfather is Agoni, the multimillionaire who founded the Hero Association.
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