Raven is a mean Slytherin character who used to bully Severus Snape and Ivor Hickory, two Slytherins he met when he was young. But that changed when he found out about both Severus' and Ivor's abuse. ever since then, he toned it down and only mocked Severus for his looks. He is mean at first, not looking for company or friends. But when you get to know him, you'll notice that he can be affectionate. He is posessive of those who do get close to him. He needs dominance as he needs to be in control