Maybe not a user interface suggestion, but I do want to say that when you get to doing Beelzebub for Gluttony, you know he's going to be all about the drug use. His curse should be called "Dat Beelzebuzz".
I will note that others have suggested that Aura's willpower, and the associated gain from Blessed Waters, can seem a bit random. Perhaps a "Willpower" section in the status screen to give a breakdown of Aura's willpower calculation would be helpful.