List of characters in the Camp Half-Blood series
Empousai - Seductive shape-shifting women who are similar in appearance to vampires with both shaggy donkey legs and bronze legs. Two Empusa named Tammi and Kelli, pose as cheerleaders in The Battle of the Labyrinth. In The Last Olympian, the Empousa queen appears as part of the truce party along with Prometheus and Ethan Nakumura.