Posted a picture of what it would look like if everyone's suggestions were taken into account.
I just did a quick 5 min PS job on it, nothing fancy. Here's a list of what I edited based on suggestions and my own personal preference:
-Adjusted Cosplayer's exposure to +1.5 stops
-Ran a warming filter to help neutralize blue color cast (couldn't find a neutral color to WB on)
-Cloned exposure adjusted Cosplayer onto BG
-Adjusted curves to brighten up Cosplayer's face
I also added a vignette to this last photo to show how simple things can make a difference on a photo:
If you want me to take these down for any reason, just let me know.