Celia and Lettie, the two assassins serving Marquis Elmdore, are really Ultima Demons. Ultima Demons are also summoned by Folmarv Tengille to fight along side the undead Zalbag, and are present during the final battle. Ultima Demons are immune to Holy-elemental attacks, just like the Archaeodaemons. Ramza, Alma and Luso can learn its Ultima spell, one of the enemy abilities, if they are hit by Ultima and survive the attack.