I disagree with a good many of your commenters. When I hear Siamese, I think "twins" - I think the black space indicates where her twin is missing (or I'm completely wrong, they are completely right and you left too much black space).
I love this shot. I lived in Asia and I think she has a respectful paying attention look on, not one of disinterest.
Do you mean Thai? Cute girl. The off centeredness here creates a void that suggests she is a deep person, and that this is only a part of her that you could capture. Nice work!
Although this is a very clear and interesting image it seems the black to the right is there simply to have it meet the challenge. I think the image would work better with a smaller expanse of nothing.
This could be a very amazing photo if not for the overprocessing, The shadows created from the processing take away from the photo and make it look like a copy of a newspaper photo.