Artemis, as in the Greek Goddess of Hunt, Wilderness and Wild Animals? Huh, nice take on her. Explains the toga like dress.
While the picture and pose, as well as costume is nice and dynamic, I find myself a little... disappointed(?) with the facial expression. It seems more playful to me than one would expect of a Goddess whose spheres of influence are centered around killing and survival. I think it could have been more fierce that it is. I think the main problem is the eyes, as the whole 'shout' that is seemingly there is easy to see, but the eyes fail to express an anger, a determination and will to survive that I come to expect when we're talking about a Goddess of Hunt.