Cleo de Nile is the daughter of the Mummy and is sometimes friends of Frankie Stein. She is a school diva and is the leader of the school's Fearleading squad. Cleo is spoiled and arrogant at times, but she is not without a kind heart. She has an assistant, Ghoulia Yelps. Her boyfriend is Deuce Gorgon. She is voiced by Salli Saffioti
She's is a student from Brockton and she helps the school out for the Halloween Dance. She and the others were being chased by Volf and the pack of werewolves only to be saved by Terrence.
- Terrence: Halloween Thriller Night
- Her voice actor, Salli Saffioti, also voiced Clawdeen.