The Citadel Guardians are at least six wardens of the Crystal Citadel. Their purpose is to arrest and imprison beings that commit cosmic crimes. The Citadel Guardians kept the Multiverse in order by keeping the prisoners frozen for all eternity. Should any prisoners escape, the Guardians would obliterate them with powerful white lasers that shoot from their heads. They have existed for a very long time, and as of "Escape from the Citadel," they are presumed to be extinct.