Vesuvius

Vesuvius is a a demon of Lust made entirely of leather. Xe uses humans for pleasure until it exhausts them to death, and then xe steals xer victims souls. Unlike most demons, Vesuvius cares a great deal about consent, and will not take a soul and end a life until the human their with is begging for it. It is able to say they've never harmed a human in a non-sexual non-consent, which makes them impervious to standard demon-hunting weapons, as they are all enchanted to harm guilty killers. A sexy loophole.