Ultima is an optional Esper located in the deepest reaches of the Great Crystal in Giruvegan. Considering how big the Great Crystal is, and that only chosen people can use the waystones, Ultima seems to have been stored in a place where the Occuria can easily keep track of her. Defeating Ultima rewards her icon in the Sky Pirate's Den in the Clan Primer, earning the player the title of "Fell Angel".