Demona is an immortal gargoyle who was once a member of the Wyvern Clan, and one of the co-conspirators in what became the Wyvern massacre. Blaming humans for her misfortunes, she has spent the last thousand years seeking to exterminate them.

Once a heroic gargoyle named "Angel" and Goliath's mate, Demona becomes consumed by hatred for humanity after a betrayal. This hatred fuels her centuries-long quest for revenge, making her a formidable foe even for the Gargoyles clan.