This is an incubus.

It's meaning comes from Latin. The male version of a succubus, it takes a beautiful figure to seduce and corrupt and absorb life force.

Hold on. Lebe doesn't fit a typical incubus' image at all, right?

A traditional incubus assaults sleeping women and impregnates them, but if Lebe were to try to absorb life force, it would instead be a futanari mounting Lebe and attacking him, after which he would become the bitch. With an androgynous appearance like Lebe, doesn't it feel like this would happen, and he would afterwards be made to dry orgasm, right?

That's also true.