List of characters in the Camp Half-Blood series
Phobos - The God of Fear and the son of Ares. He appears in Percy Jackson and the Stolen Chariot in The Demigod Files. Phobos and his brother Deimos steal Ares's war chariot from Clarisse. Then Clarisse and Percy have to find it. Phobos has the power of showing people their greatest fears. He shows Percy his greatest fear, which is Camp Half-Blood catching on fire and burning, when they are fighting in an aquarium in a zoo. The word "Phobia" was named after him.