As a fighter he didn't disappoint, as a character we don't really his full story but it seems interesting
He was there during god valley, he somehow became like a little brother to big mom, he was experimented on by vegapunk himself, he views onis as superior to humans and thinks that humans only help other creatures because they fear them, he knows about the void century and joyboy, he wanted to go to marineford for unknown reasons which seem really fishy because he didn't bring his whole crew with him
So I'm gonna wait for a flashback
He was there during god valley, he somehow became like a little brother to big mom, he was experimented on by vegapunk himself, he views onis as superior to humans and thinks that humans only help other creatures because they fear them, he knows about the void century and joyboy, he wanted to go to marineford for unknown reasons which seem really fishy because he didn't bring his whole crew with him
So I'm gonna wait for a flashback