The constellations sometimes seem like ruthless gods that know nothing of being human but other times they're like the most childish creatures ever...but I suppose it makes sense in a way. I mean I don't read the novel at all so I don't know what they actually are but for now, I think they're some form of higher beings. It makes sense they act the way they do because even if you're almighty, you need some fun and this seems like the way they have the most fun by watching, bidding, guessing etc...