List of Percy Jackson and the Olympians characters
Deimos: The god of terror. He appears in Percy Jackson and the Stolen Chariot in The Demigod Files. Deimos and Phobos (his brother) steal Ares's war chariot from Clarisse. Percy and Clarisse have to get it back to Ares before sunset. On the way, Deimos comes in front of the ferry that Percy and Clarisse are on while riding a sea serpent. He comes back later in the zoo, terrorizing Clarisse by shape-shifting into Ares and yelling at her. Clarisse deduces his true identity and defeats him.