Hey wes,
The sprite looks nice. The animations feel not quite there yet.
In the running loop, the torso, apart from twisting stays nearly stationary. looks very stiff that way.
The jumping seems more like she's lifted by a wire, than jumping from her own force.
Mhhh i cant really say for sure what exactly is odd with the round slash but it seems off. i guess there might be a frame missing in between the slash to understand how the pose ends up where it started. also it reminded me of ryu's slash
http://www.spriters-resource.com/snes/breathfire2/sheet/20122/The stab looks very defensive since she moves her leg backwards.

made her balance on the hind leg, adapted some of the frame timings, twisted her torso a little in the third frame and shown her left arm to indicate a the actual lunge. finally adjusted the sword position a little to blend better between poses
Edit: After looking at it again, it seems there could even be more torso twisting expressed, especially in the stab frames. With a sword of this size you wouldnt just use your arms but your whole hips and torso to move that thing with the greatest force possible.

admittedly the change is very subtle. but if you look at her hips and back it seems like a more natural motion