So it is a required fight? I just showed up and both Violet and Fargrim went to town on her.
Also, I guess I should have specified where I am with Grace. I met her in the Forsaken Keep after a quest, (can't remember if it was a main one.) She proceeds to take over Celica's body and use it for herself for the next 4-7 days, Nel helps get Celica's body back and Grace proceeds to leave and I never saw where she went. Fortuneteller just says "Let her control Celica" and I can't find a marker indicating her location to save my life, so I can only guess she is in the area after the Snowrock Village because she was ice element in her fight and I only have around that much of the map available. Am I on to something or have I gotten this completely wrong?