Polaris cosplay by Jenn Marvel, found at Geek x Girls, cosplayer quote below from that site.

I decided for this cosplay i was going to do my own take on the character,  I love the artwork but I’m not real comfortable with the design of the characters costume, so I decided to modify it to fit my body and my comfort level.  I wore this at Niagara Comic Con and it was a lot of fun to wear.