I like how you can see the feminine form here even though there's little detail. The pose is good, except maybe the position of the head--I'm not sure I am correctly seeing the way she is facing. I think however that the centered approach is not dynamic enough here.
Well, this certainly is a silhouette shot and appropriate for the theme. I am usually drawn to these types of silhouettes (human form) but for some reason your image is missing something...... I just can't figure out what that "something" is ? Maybe if the head were turned slightly sideways so we could make out a face profile it would help, I don't know? Thank you for sharing this with us.