This is a concept for a character that's been lurking in my head for quite awhile now, and is far too awesome to stay there.
His name is Zenith, and he's an Incubus (male sex demon); the woman is his Succubus (female sex demon) self, Zira.
His gender is not set, and so he can change between male and female as he pleases; he does, however, tend to identify more with males, and therefore tends to use a man's form and be referred to as "he".
He primarily feeds by seducing others, arousing them, and then feeding off their sexual energy; sex itself, while not required, is often included. The less sexual experience the person has, the better. Virgins, in particular, are a delicacy.
Human food and drink can be consumed to blend in with society when needed, or for pleasure. He can, in fact, get drunk, but it takes much longer.
A young, virgin woman and a glass of wine is a favorite meal.
(c) Zenith and Zira are mine.