From Unofficial Handbook of the Virtue Universe
Peter likes pain. When he was bound to the demon from the Abyss of Infinite Agonies, the demon's memory of its home desired pain. It filtered into Peter, and even though the demon is dormant now, he still likes pain. While he doesn't generally go out to seek it, the fact that bringing out his shards is painful, he does often get rather eager in his endeavor to fight.
Peter was always quiet and submissive, going with the flow and doing whatever was asked of him. Though he is submissive, he's not a total pushover and will voice any strong opinions on a matter.
Peter used to be generally quiet, keeping to himself, and desiring more to watch than act. Though he has become a bit more outgoing, he can still be overwhelmed at times and even freak out when given too much attention.
While he can still be rather quiet at times, his time with his old Master left him with little inhibition. He's prone to giving out way too much information when he gets talking and some of his information can be quite disturbing to some people.