A model I'm working on today - Leanan Sidhe, a type of dark fairy in Irish folklore (from the Unseelie Court):

Spicy variant (nudity warning):
In old Irish Leanan Sidhe literally means "fairy lover". This kind of fairy seeks the love of mortals. If they refuse, she must be their slave; if they consent, they are hers, and can only escape by finding another to take their place. The fairy lives on their life, and they waste away. Death is no escape from her. She is the Gaelic muse, for she gives inspiration to those she persecutes. The Gaelic poets die young, for she is restless, and will not let them remain long on earth.