Looks pretty solid.
My thoughts :
The motion seems too stiff, as if the pose was intentionally done for a camera. Try to relax her a bit and make it look like she just slashed an opponent with a sword.
Her back leg (the right one) should be on the ground as well so she gives the impression of landing - right now it feels like she's skipping casually (which might also be a side effect of the stiff pose.)
Her hair should be long and in a ponytail that is whipping outwards, to emphasize the fact she's landing from an aerial attack.
I think the fluidity will start to set in when I add finer details. Also, I wasn't actually aware that she was on the ground X] but that definitely helps, so I can fix the leg.
Other than that, this was just to give you an idea of how I was approaching your idea, so thanks for the feedback.