Succubus

A succubus is a demon in female form, or supernatural entity in folklore (traced back to medieval legend), that appears in dreams and takes the form of a woman in order to seduce men, usually through sexual activity. The male counterpart to the succubus is the incubus. Religious traditions hold that repeated sexual activity with a succubus may result in the deterioration of health or mental state, or even death.

In modern representations, a succubus may or may not appear in dreams and is often depicted as a highly attractive seductress or enchantress; whereas, in the past, succubi were generally depicted as frightening and demonic.

Succubus in The Case of the Toxic Spell Dump
Succubi were a never-ending source of aggravation for the vice squads of many Confederal cities, Angels City among them.