Wooooooooooaaaahhhh okay you REALLY improved with this one.
FIRST I'm just going to say the negative aspects: her pose is more on the stiff side, especially the legs, like she looks like she's standing up but at the same time she should me like floating? Unless she's supposed to be standing up... I don't know. Her left arm and hand looks kinda jacked a bit as well, BUT a big improvement from your usual stuff, since the stiffness seems to be one of your greatest weaknesses with your art...
NOW for some good stuff... the coloring... I REALLY like it. It's somewhat more dim, but accompanies with the shining and shading, I think you did it well enough for the armor to actually look like a realistic white-golden-color, which is kinda beautiful to me. I also like the red-brown-tan color you used, there's just so much harmony, I really like it.
The energy ball staff thingy is also done pretty well, can't really think of any obvious issues with it. Also her right arm and hand look pretty good. Background is somewhat plain, but at the same time it somehow matches the character, it's not too saturated or anything, I guess it may be because it's almost a yellow-green, which is complimenting the yellow-white? I have no idea what I'm talking about when it comes to colors, but I CAN say I like the way it looks.
And as for what FrostDrive said, I kinda have to agree that the face shows little personality, I mean it's a standard, cutesy anime girl face, which you executed fairly well, but the actual concept of that... is just a cutesy anime girl. Nothing too wrong with it, BUT you generally make that face with a lot of your other drawings, I would suggest a change up.
BUT overall nothing bad, kinda makes a good character shot, though the pose is really nothing special, it's kinda like she's just standing there, but the coloring and line-work and such are good. Probably your best drawing, good job. Next time I would really like to see where you go if you spend some time sketching and making the pose a bit more complex with a character... then apply your skills of coloring, line-work, shading and shining, and I think you'd have a pretty nice drawing...