I tried a few subtle variations on this pose and roughed in a few of the accessories just to get a feel for the composition. And yes, I am going with a slain creature at her feet because that's just crazy enough to work!
The one of the bottom right was my favorite, though I didn't really like the surprised look - I want her story to be one of more "badassedness". To remedy this I crafted a sample pose that is a combination of the top right and bottom right poses:
I really like the diagonals in this composition and the pissed off sneer seems to fit perfectly. Here is the model sheet from various sides:
These are good to get a feel for overall form but for the final comp I'm likely going to stick with an 3/4 view very similar to the larger version above - only with less of an angle of view to avoid a fisheye effect. Now I'm off to eat Thanksgiving dinner and then belly up to Maya and start some gun and knife modeling!