A Ghost is a levitating artificial intelligence used by Vandguard Pilots. Ghosts support the pilots by performing certain actions such as illuminating darkened areas, hacking Golden Age technology, and informing pilots of incoming hostile threats. Ghosts also have a navigation mode.

Ghosts originated from the Source's technology and Light and seek out their Vanguard pilot companions from the ancient dead, reviving them, and afterwards, resurrecting them continuously if they are killed by the forces of Neo Olympus.