The Ghoul (Wraith in The Complete Collection) is an enemy in Final Fantasy IV. Ghouls usually appears in packs of five. They pose no real threat and can be quickly disposed of with a couple Fire spells.
Wraith is a Scottish dialectal word for "ghost," and/or "spirit". It has also been known as Ghoul. A ghoul is a folkloric monster associated with graveyards and consuming human flesh, often classified as undead.