Upload & Sell: On
I don't think it needs a separation light for the hair. There is enough contrast to tell where the hair ends and the background begins. It's not like the are blending together.
I would think about cropping to square and getting rid of the left side of the frame. It doesn't really add anything, and the way she is posed, she is already angular and almost in the shape of a square, and with her head tilted like it is, it's not dead center.
Thanks for the comments, will give the crop a try!