Philos was a demon warrior and one of Deidra Finian's four guardians. He posed as a human warrior under the nickname Pip and served his mistress Deidra loyally until he was finally allowed to reveal his true form in Illunii. He met his end at the claws of fellow demon Jezebeth, but his sacrifice gave the Dresdens valuable time to regroup and thwart Jezebeth's plans during the Battle of Illunii.