The psycho's

Harry is broken after he finds out Dumbledore killed his parents, even more when Hermione and Ronald end up agreeing to the headmasters actions. Not payed, but promissed with lots off goods and rights if they win the final battle. He breacks so hard that almost everything good about him disapeared, the only one being able to control him a bit and keep him human is death himself, his mate after he (harry) forced himself in a creature inheritance.