The girl who changed it all (Aot X Magical! reader)

You Were a demon yet so beloved by the Military Police. You trained with them, revised plans with Erwin practiced with Levi. Then suddenly you changed. Wouldn't smile wouldn't laugh, you wouldn't even look anyone in the eye. Then you joined the Trainees for hope of officially joining your idols. What happens when the Military Police find you again, and what happens when you meet some really cute (or horsefaced...) trainees