List of characters in the Camp Half-Blood series
Circe - Circe ran a magical beauty boutique in the Sea of Monsters. She was glamorous and went by the alias of C.C. While she treated females at her spa, she turned males into guinea pigs. When Percy was turned into a guinea pig, Annabeth managed to use Hermes' multivitamins to become immune to Circe's spells and escaped with the guinea pigs. Not knowing which one is Percy, Annabeth fed them all multivitamins restoring Circe's victims to normal.