I think you did a wonderful job with the fractals and the b/g colour is wonderful and suits well with the render without it being too blended in, it's very colourful without it being too dramatic, well done

I would have to agree with the others, the second head blob is too distracting, a bit of clip masking would be great, but smaller particles, I would also suggest overlapping ( if you can) some of your beautiful bg, to slightly blend into your focal, so as to appear like she is melting into it, like maybe lover part of the front of her shirt or back of her left arm facing down.

Cool play Image ^^