Early in the main story, the player meets this band of newbie adventurers heading into a dungeon, one of them being Edda and her fiance Avere. You meet them again shortly after, only Avere is missing. You learn that an accident happened in the dungeon where, due to Edda's inexperience, Avere passed away. The group's black mage and archer leave her behind as a result, but not before mentioning how creeped out he was that Edda
actually kept Avere's head with him.
Edda meets you face to face a bit later, remarking that she and her fiancee always looked up to you. She takes this meeting as a chance to "start over" and continue her training. She still has his head.
As time passes, Edda slowly starts going nuts. She travels all of Eorzea with Avere's head, talking to it as if it was alive, and slowly comes up with a plan to bring him back to life. She sends out wedding invitations to the archer and black mage, the latter of which is whom tells you about the whole ordeal. The archer dies earlier in the game in an unrelated story point, so you go visit her grave with the black mage only to find that the grave's been dug up. Fearing the worst, you go into the location of the "wedding", which is the same dungeon where Avere originally died.
Inside the dungeons are ripped scraps that chronicle all Edda went through to set up the ritual and her descent into madness. Blood is seen scribbled along the walls, often times in just long strings of Averre's name. The first boss found in the dungeon is a the reanimated corpse of the archer whose grave had been dug up. At the end, you fight against both Edda and Avere,
whose been brought back to life as an incredibly creepy Ahriman. Upon defeat, Edda slowly backs away from you to the edge of the circular arena, which is covered in lit candles. One of them lights her robe on fire, and she falls off the edge while the flame spreads over her, a smile on her face the whole time.
After clearing the dungeon, you talk to the black mage outside whose lamenting that this all happened. He sees something out of the corner of his eye, and is freaked out and runs away.
