Created a more detailed version of it, I went for a Greek-ish style, because Valkyries are from Greek Mythology (No they are not, they are from Norse Mythology, I just confused Valkyries with Harpies), and because I was listening to Halo music so the whole "Spartan" thing got stuck in my head :3
The melee Valkyrie's main weapon, the almighty energy battleaxe!
Now, a front and back view (Question: Why I used Minecraft? Answer: First, I have a good sense of space in the game, second, I can't use Qubicle and don't have the patience to do so just to support one game (Although the game is freaking awesome!))