I intentionally blew up the water crystal. Airy turned into a giant larval abomination. She kills everyone. The angel that was really Agnes the entire time revives your team. You go to the great chasm where Airy is now nesting. It has turned into a literal hell hole. You fight your way down there. You kill her. You kill her bigger form. She bitches about all of the characters throughout the fight, completely explains how the worlds are connected, and how she's only a messenger for the real world destroyer Ouroboros, and that we wouldn't hold a finger to him. Then, we kill her in totality, get in the grandship, talk to the sage and vampire, and all hop back to the third world which is apparently just fine and not destroyed, and the game ends with Agnes becoming the angel.

I'll update my characters when I get home, and I recommend trying something different instead of breaking the Crystal. Instead, do what you think they want you to in the first place... Or Bravely Default, if you will.

That was part of the narrative wasn't it? Deciding whether or not you should just follow with orders

You'll see for yourself. And don't be afraid to see the Asterix bearers again.

In the traditional style of those who came before me, I have done literally everything that could be done before progressing with the main story.