Keep in mind = Save her, or do whatever you want, just make sure you show up to help her in the initial message. Yes, you are the Aeon of Destruction. (Look, I'll be honest with you, I don't know the lore of the game, I just know that Aeons are strong beings of the cosmos, so I improvised on top of that. I had a scenario like that in my head, so here I did it.)