Here's my (hopefully constructive) viewpoint.
1) Her arms- While your overall anatomy is wonderful, look at the 'thickness' of her arms...
2) Her left foot- The angle seems off, and this could be due to a couple things: Possibly the tangent line that lines up with the skull behind/beneath that foot, or possibly just a mis-positioned reference.
3)Her helm- The bottom right feels like cloth, like it folds and wraps around her, but the top left feels rather flat. Almost as though it needs better definition via shading or that it should wrap closer to her head, not with herhair.