I do not wish to rain on your parade, but those conscripted into the Garlean Military (particularly those inducted from an occupied territory) are magically brainwashed. They have no will of their own. We have been given no example of an Imperial conscript breaking this conditioning, or information as to whether or not it is even possible to do so. Further, we have next to no lore out there on how the Empire would respond to the Echo. Given their response and attitudes toward the Primals, one can speculate it would be less than stellar. That which does not fit into the Garlean's religion tends to get put on the list for extermination. Mind you, I am not saying you cannot include these elements in your back story. I am just encouraging you to take these things into account and resolve them as you create it. You don't want to paint yourself into a corner when more of the story we have yet to see unfolds. For all we know the Empire has no clue that the Echo even exists, and it is possible they exterminate anyone displaying it as a heretic or some such.
Just some lore food for thought.
Just some lore food for thought.
