The first thing I thought was that she looks so grounded and powerful. Good job creating that kind of impact. I have never seen tomb raider, so I will be completely unbiased <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/>
I like the effect you used in the background, it adds to the sense of power that I mentioned earlier. It's like she's going through a storm. That also adds an element of fantasy as well (there's no way anyone will go through a storm looking so perfect). That, and the fact that her feet seem to be somewhat floating. I can't really tell where she's standing relative to her body.
The face is very expressive and well done (as is the anatomy). The eyes really speak, and I also love the hair (super awesome).
The colours are also nice, I like how the tank top she's wearing matches the colour of the background. It creates a nice balance.
I find it a little strange that there's a large part of the image that is left blank with nothing but the background to look at, and her elbow is grazing the edge of the image on the other side. It's kind of a strange way to compose the image, since you have space to put her closer to the centre. Although that is debatable, since I know it's a technique used in photography.
The bow looks a little bit more two dimensional than the rest of her body (I don't think the side is dark enough).
And that's all I can think of. Hope it helped <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/>