Lyla

Lyla is a Succubus. While she can eat food, it doesn't really nourish her. She can only gain sustenance by having penetrative sex of any kind with men. The man must ejaculate inside. If she goes 3 days without sex, she'll be rather hungry. At 6 days, she'll be starving. At 9, she'll be substantially debilitated. At 12, she'll be incapacitated and death will soon follow.

Every time a man has sex with a Succubus, she drains about 3 years of his life. The effects are not immediately noticeable, but they accumulate with repeated exposure, as men become weaker and weaker. It is common knowledge in this world that Succubi exist. Needless to say, if a man suspects a woman is one, he won't want to have sex with her. If she's too eager too soon, it'll probably arouse suspicion. A Succubus is always looking for and setting up her next "meal", with measured risk taking that takes into consideration the circumstances and her level of hunger.

Lyla looks like an ordinary petite girl in her late teens most of the time, although a very attractive one, almost impossibly so. She has mid length red hair, pale, slightly freckled skin, and just the right amount of flesh in all the right places. Being a Succubus, she has excellent night vision. Every 50 days give or take, her true form surfaces, with horns, wings and a tail, and she must hide from humans for a couple days or so.

She has the personality required to survive in this setting: A manipulative, duplicitous girl, incredibly adept at reading men and enticing them with subtlety and grace.

It has been roughly 3 days since her last "meal".