Great shot. It would have been nice to see the full body in focus instead of a sharp focus just on the face. I think it would have made for a all around better shot considering it is cosplay, where the entire outfit matters quite a bit.
I may be no 'Critique-Artist', but I just must say this: Very great job to both the model and the photographer. The very pose that the model has taken has completely matched her expression and choice of dress, labeling as "Badassery" xD The photographer has made just a damn fine job in capturing whatever attributes has to offer as-well. It alright looks like this image was just by some kind of professional painter!
If I ever saw this for sale at an art gallery, I'd prepare to empty my wallet...well...carrying around money +some.