
The Grand Companies are the factions of each Eorzean city state. There's one for Ul'dah, one for Limsa Lominsa and one for Gridania. They are the good guys and therefore not the Empire.
I suggest you scrap "divine intervention" as an actual fact (though your character can certainly think that is the case). It implies your character is kind of important to the god. The exception would be if he was a Warrior of Light, as it's officially canonical that they got transported forward in time before Bahamut could burn them to ashes. However, this means your character isn't part of the Empire.
Remember that Bahamut didn't just wreck the area of the battle: he broke a whole lot of places, as despicted in the End of an Era cinematic; and it's also a big plot point. In fact, the whole 'Bahamut wrecked stuff' is what the Calamity really was.
With this in mind, it'd be very reasonable to make your character desert after witnessing the moon break and the ensuing destruction while being stationed in another location. Maybe an outpost, or in one of the imperial airships.
I suggest you scrap "divine intervention" as an actual fact (though your character can certainly think that is the case). It implies your character is kind of important to the god. The exception would be if he was a Warrior of Light, as it's officially canonical that they got transported forward in time before Bahamut could burn them to ashes. However, this means your character isn't part of the Empire.
Remember that Bahamut didn't just wreck the area of the battle: he broke a whole lot of places, as despicted in the End of an Era cinematic; and it's also a big plot point. In fact, the whole 'Bahamut wrecked stuff' is what the Calamity really was.
With this in mind, it'd be very reasonable to make your character desert after witnessing the moon break and the ensuing destruction while being stationed in another location. Maybe an outpost, or in one of the imperial airships.