Shirashi is one of the escaped tattooed prisoners, he has a talent of dislocating his joints to escape prisons, he can escape nearly anything, he also keeps certain items hidden in his mouth tied with horse hair, like a small razor and a bullet. He's kind of  the comic relief as he kinda gets his head bitten by everything, and he's always being insulted by asirpa for appearing to be useless in hunting, but useful in fights.