Pearly Soames is not a nice Vampire, but he isn’t a Rogue either.
He does what he wants, when he wants to, but will not set out to harm innocents on purpose.
He has a gang called the Short Tails who have always traveled with him. They do his bidding with no questions asked.
He will negotiate with you, if you want something, but he is a shrewd individual, and rarely will anyone else come out on top.
(Dilios Note: It is known he has a soft spot for Nicolaus, and that the Roman can handle him to some degree)