In the case of Anunnaki/human interbreeding, are the souls of their descendants Anunnaki or human, or if they can be either, what are the percentages?

The souls can be either, but it is most likely the case that it is an Anunnaki and the reason for this is—the Anunnaki are quite strict and quite focused on maintaining their genetic lineage and do not want interlopers in their sphere of influence whatsoever. When they are interbreeding, it is to produce an Anunnaki soul within the offspring. This is not consciously perceived in the way a human would because they see the soul as the spiritual heart of the individual and the primary form of existence from which everything else extends. The Anunnaki do not view any one individual as sacred in their own right or having a sacred heritage and do not regard the existence of souls as anything but a superstition. What happens here is—there is a strong desire for persistence of the lineage that creates an intention to have an Anunnaki offspring and identity first and foremost for all of the children born to the human/alien coupling. That strong intention will outvote the human partner in this alliance as well as any souls who might wish to have this experience and may volunteer. Keep in mind—there are always agreements for all parties before an incarnation will occur, so everything is agreed to with regard to who is coming in to join this unholy alliance, so to speak. It is not natural for these species to interbreed, particularly when one so thoroughly dominates the other and it will add to the subterfuge and manipulation to create such hybrids as they can infiltrate society—and have in large numbers because they will pass as humans physically and do not arouse suspicion from their appearance. This is the major reason for this interbreeding in the first place—it is to carry out nefarious aims and keep people in the dark about what is happening right under their noses. Once the offspring grow and prosper, they can have offspring of their own, but the same questions arise and the same attention will be given to maintain the Anunnaki lineage. So the choice of breeding partners is very carefully planned and controlled. This keeps things within the family, so to speak, so others involved hold a strong desire for an Anunnaki presence and a control on a deep level of the new life coming in.