Just some random thoughts. I remember back when Nim turned to stone saying I'm sorry this isn't me or something like that, and that makes me wonder what did she mean by that, what if Nim is being possessed by something? I hope we can find out about this.
Another thing I'm looking forward too is the whole archetype thing that was created when Melia, Erin, Alice, and Allen interacted. This will sound cringe I guess but anywayyy I believe that Maria/Marianette is actually all these 4 characters merged into one. The reason I believe that is when we go to hiyoshi city and we go in the hospital, we see a report of anathea having 4 kids but when we went to the past it seemed like Anathea's only kid was Maria, so what if actually Indriad "split" Maria into 4 other kids?
That's what I had and I'm sorry for bad English/grammar haha