Succubus

Appearance
A succubus, when in her natural form, resembles an incredibly beautiful and alluring human woman, with a lithe figure and dangerously seductive features. Despite their comeliness, succubi possess several clearly demonic attributes, not the least of which are a pair of large, bat-like wings sprouting from their shoulders and sinuous, writhing tails. Of course, it is very rare that a succubus's victim actually sees this form as they are adept at shifting forms to become whatever their victims would find most attractive.

Combat
Succubuses preffer Subtly and steath rather than direct confrontation, their ussual way of approach is trying to seduce their target, Lure them into a false sense of security, get their confidence, and once close, they will strike, draining the life energy of their victim, with a cold ruthlessness.

The Protagonists had a viscious encounter with one of these seductresess.