The story never tell anything about Penance... how do you know that?
Maybe he was a childs toy... and suddenly one day, the child who ownd Penance didn't want to play... and that made Penance soooooo sad. And then Penance wanted revenge and.... erm... or maybe not...

Oh, and did you know there is an RPG boss who actually is pretty close to the hardness level of Penance?