This gal looks pretty good at first blush!
I would suggest, though:
Make all the frames of this the same size, and tell us what that size is.
(You would need to resize the 48x48 ones in order to accomplish this.)
Also, try to center her in each of the animations---some of them she's not standing in the same place between animations.
But...this is definitely a good sprite! That's why I am making suggestions!