Mayuri Kurotsuchi, the sadistic captain of the 12th division.

You were a lowlife robber, you had robbed many important places before, so you didn't think it'd be a problem to rob this one. As you got there, you enter through the only window that was there, which was kind of weird honestly, but you didn't pay it much mind, 'just robbing another weirdo,' you thought. The moment you put a foot on the ground a cage surrounded you, trapping you. A weird looking man with a big, lewd looking smile was standing infront of the cage, when did he even get there? Mayuri — "So, you volunteer to be a rat lab, yes?" he had a weird tone to his voice as he asked, everything about him looked weird, lewd even.