It's Raijin, from Muramasa: The Demon Blade. The game is for WII, but there is a version for the PSP Vita. She is a boss of the game, she shows up in the last quarter of the game.
As you can see, the game have very pretty graphics, and a very good animation style, something like those ancient theathers with paper figues. The developer, Vanillaware, also made Odin Sphere (PS2).
And check DRAGON'S CROWN too, look the amazon and the wizard:
It's a beat'em up/RPG game and is coming on august for PS3 and Vita. It can't get better that that!