Empusa - Succubus Bluaz

Empusa is not a demon but a demigod from Greek mythology; a demi-goddess, in fact. She often appears in writings as a monster at the command of Hecate. Empusa is frequently likened to or categorized alongside the demi-goddesses Lamia and Mormo.

Empusa

Empusa was the beautiful daughter of the goddess Hecate and the spirit Mormo. She feasted on the flesh and blood of young men whom she seduced in their sleep (sleep paralysis). She is often imagined wearing bronze slippers and having flaming hair. It is said that her name comes from the Greek έμπούς (one + foot); this gave rise to other depictions of the empusa as a hybrid monster with one leg like that of a donkey and the other a bronze prosthesis. Due to her appetite for blood, the empusa has often been mistaken for a vampire.

Empusa in Modern Folklore

In Greek mythology, Empusa, daughter of Hecate, appears as a specter sent by the goddess Hecate to guard the roads and lure travelers. Hecate herself is the goddess of the crossroads. According to Philostratus, the empusa would flee and hide while emitting shrill sounds, sometimes resembling insults, thereby luring her victims. In Aristophanes' The Frogs, the empusae scare Dionysus and Xanthias to death on their way to the underworld.
The term empusa is still used today to refer to ghostly apparitions that take the form of a dog, donkey, ox, etc., and harass Greek shepherds.
In the novel Grecian Rune by James Matthew Byers, the empusa is described as being almost human and is the main character of the novella.
In the Percy Jackson book series, empusae appear in The Battle of the Labyrinth as servants of Hecate who had allied with the Titans. Later, in The Last Olympian, the first empusa appears, released from Pandora's box.