These are all really great POVs! I love the feedback @ameliori gave and I think I resonate with that.
I like B because it shows the distance growing between them along with their expressions which will help read the scene better even though it's a simple perspective.
D looks way more emotional. So it depends if you want to show a mutual goodbye (as in "B") or a one-sided goodbye (as in "D"). In D, you could try having the spirit turned around facing the camera so that the viewer can see her expression as well. This may help elevate the pain in their parting.
Great work on depicting the same scene in so many ways!