The fairies--Attack on Titan/fairy tail crossover

Isabel Smith. Cousin of Erwin Smith.

At only 10 years of age, she watched her sister risk her life and get eaten right infront of her eyes. Her parents are missing, without a trace.

When she turns 12, she joins the cadet program, and trains to be a part of the survey corps (scout regiment).

She doesn't meet them until the final days of training. The ones called Natsu, Gray, and Erza. They seem to be hiding something behind the smiling faces...but what?