About that latter part. . .
I actually have a Nabriales retainer cough. because you can see his features rather in-depth in-game; he has about the same amount of cutscenes with his face uncovered as he has with it covered and only one Midlander face has the sideburns, so it's easily to determine what he looks like.
All I can tell of Elidibus and Lahabrea is that Lahabrea has a more feminine facial structure with fuller lips on the Astral to Umbral album cover.
I would be okay with that end-game, returning to balance and stability as it should be, with everyone living happily ever after. Not even sarcasm. Minfilia can have Second Best Ascian.