This is concept art of Elmina from the Shining Wind X mobile game. I believe she's the main heroine of the game. It's really hard to find official art of her, as 90% of the pictures that come up are of the PVC figure of her. I squeezed this image out of Google.

http://moe.imouto.org/post/show/21732/cleavage-elmina-shining_wind-stick_poster-tony_tak