This lady is Elin Kuzunoha, and while she's cosplayed as characters from One Piece and Final Fantasy, there is one character she focuses on: Street Fighter's Chun-Li.
Kuzunoha's website is wall-to-wall Chun-Li, her blog is all Chun-Li, her Twitter account has Chun-Li splashed all over it. You get the idea pretty quick that the Japanese native really likes Chun-Li.
And not only does she like Chun-Li, she looks like her. Her wardrobe also boasts a variety of outfits. It doesn't stop there. Kuzunoha is the same height as Chun-Li, the same blood type, and she has roughly the same measurements (Kuzunoha's bust is slightly larger, and her hips slightly smaller). But damn, she even has Chun-Li's poses down cold.
Kuzunoha isn't dressing up as Chun-Li. She's probably as close as we're going to get to the character in the flesh. Elin Kuzunoha is Chun-Li.
Check her work in the above gallery. More in the links below.