Arianna is a protagonist in Etrian Odyssey 2 Untold: The Fafnir Knight. She is the daughter of the Duke of Caledonia and meets the protagonist since he and his friend Flavio are her escorts to perform a ceremony that takes place every 100 years in the ruins of Ginnungagap. She is of the Sovereign class which is the equivalent of the Princess and Prince class from Etrian Odyssey III: The Drowned City.