Ksiedze

A demon that dabbles in blood magic, no-one really knows his origins
His morality isn't concerned with the plight of mortals, he does most things for his own entertainment
He chooses to dress in religious garb because he thinks the irony is humorous

He's currently possessing Dominick and is keeping watch over his interactions with the angel Ezra
He's not too sure what he's going to do with the situation yet, and helps or hinders the couple's progress as the whim takes him