Pick is a killer, and he always has been. He doesn't feel remorse, he doesn't feel regret, and he certainly doesn't feel any guilt.

All of those were beaten out of him a long time ago; over a long period of time, and sometimes he can still feel the sting of those beatings; the bruises still show on him when he glances at himself, just to disappear when he looks again, his bones feel like they'll break again, but Pick always remembers something to help him realize that he's fine.

He can always kill the ponies that did this to him. That's what they taught him to do after all. Kill, kill, kill.