The cosplayer here is Anna, better known as Feyische, and she’s impressively transformed herself into a Draenei warrior.
Look at the feet and legs. She pulls of that forward bend on the knee so well. Combine that with the giant hoof on each foot and you’ve a cosplay that’s spot on and would leave you sore by the end of the convention.
(Via Amy Ratcliffe at Fashionably Geek.)