I first noticed the hair, then the jacket, and the hair said Anna, but I've been seeing a lot of Attack on Titan cosplays recently so that color jacket first makes me think Scout regiment, but only when I first saw the picture for like a second. After I blinked I immediately saw it for a full Frozen cosplay. Hahaha! It's cool! Nice work! I've only seen the first season of Attack on Titan but I have seen Frozen about a dozen times.