To me the figure of Movement A looks like O, the main body, holding another behind it, representing us.
The figure of Nijinsky also seems like O holding another smaller figure.
In both the above the central character is standing on one leg. This is remedied in the fourth image, by doubling the figure, in Pas de Deux.
The exhibition seems to point to Rodin being quite absorbed by the one figure represented in Movement A and similar ones. I feel he was guided by O, who was trying to indicate that movement is an important form of communication.
Rodin is said to have thought movement should show both its provenance and indicate where it is going. I would not agree as O is the one who decides what happens, not the artist. In my opinion.
Some images of the sculptures are in Gallery.