Characters who have Angel/Devil Shipping

We all know the appeal of characters who play with another person's mind like it's a game and what not, For some reason, they've got a special interest in playing someone in particular. Take two characters: one sweet, innocent, kind, loving character and the other is malicious, evil , possibly perverted, and maybe a sadist possibly perverted . In other words: you have an angel and devil. The Devil pays special attention to the Angel, as they have something about them that no one else has and this attention goes to the point of villains wanting heroines for more than just villain reasons but maybe for certain other ones too.