Ghost is an enemy type from Final Fantasy Mystic Quest. They appear as floating fiends under sheets. Like many undead enemies, Ghosts can multiply themselves if there is room on the battle screen, and can lower the attack strength of party members. However, they are also naturally weak to the Cure spell.
ghost is the soul or spirit of a deceased person or animal that can appear, in visible form or other manifestation, to the living. Ghosts are generally described as solitary essences that haunt particular locations, objects, or people they were associated with in life, though stories of phantom armies, ghost trains, phantom ships, and even ghost animals have also been recounted.A
In the German release, these spirits are called "Furcht Laken" meaning "fear sheets". This is in reference to the stereotype of ghosts resembling bedsheets with eye-holes cut out of them.