I love the costume. I love the character. I love the look. I think you do are really good job with these/in these photos. I think that the sword is great. I love the background.
I think that there isn't really too much that can be done to make this better.
I feel that adding dramatic lighting would make this image more powerful. I want to see a little more of your face in this. I feel that your emotion and look really drive a lot of these photos. You don't want the photos to take away from you.