Julia Kasu, aka KasuzameYuu, is a costume builder and cosplayer from Russia. You may never have heard of her, but if you read this website, you should have seen her work from time to time.
Her Left 4 Dead outfits (both of which she made, while she also "played" the Witch), for example, are some of the best examples of the art you're ever going to see, while her more recent Skyrim Outlaw costume takes itself more seriously - and literally - than you'd think.
I've included the best of her costumes and shots in the gallery above, but to see more you should head to her DeviantArt page. CLICK THRU TO CHECK OUT THE GALLERY