She is from the magical city, Sorceria, which had been sealed away by Gracos. The player will first encounter her in the Moonmirror Tower as a spirit, similar to what the Hero and Carver were, and she joins the party after they retrieve Ra's Mirror.
After journeying into the Archfiend's realm and defeating Mortamor, the group returns to a world at peace and the party returns to their homes except for Ashlynn who only briefly returns to her home to tell everyone what has happened and she is then informed that she should study at Zenithia and learn from King Zenith. She chooses however to stay with the hero. Upon arriving at the hero's palace, both are greeted by the King and Queen who compliment the young "couple" much to their shyness and invite them to the royal celebration. However when the hero begins searching for Ashlynn he finds her in the throne room and sees her beginning to fade away with the Dream World which is now separating from reality. The Hero and Ashlynn tearfully say their farewells as she disappears along with the Dream World. All that then remains of the Dream World is Zenithia.
After the end credits, the reunited party gathers at Madame Luca's house upon Milly's request who shows them something through her crystal ball. They then see Ashlynn alive and well and residing in Zenithia where she is witnessing the hatching of an egg that holds a new future. Upon hatching the egg releases a stunning light which amazes Ashlynn and the onlookers.