You have an alternate personality disorder, one side is normal, sweet, skittish and kind while the other is.....a killer, sadistic, ruthless and rude. If one tried to take over while the other is in control, then you’d get a headache and they switch at random.. heh. It didn't start out this way tho, you used to be one whole.. until you met Billy and Stu that is. They tore your personality apart, they broke you and made an entire new thing out of you, its what they wanted you to be.