Maz - What is that WOJ? Interesting bit of info. I think if you look at Vampires as a whole, they are all connected a to Outsiders, quite a bit more than your average nasty. Perhaps that is where their origins lie. Certainly strong links were between the Reds and Outsiders, both direct and implied. The White's also have some very strange links, but also both direct and implied.
I think it is no accident that vampires are one of the main villains of the series.
Mavra is not only the only Black Court senior official, she is the only one left from before the destruction of her Court. All the others we have seen have been her progeny.
Not sure if who's statement you are confused by..but if you are referring to mine I will explain. As I see it, I am not saying she is on the Grey Council - alllawyersarewizards said that. But it isn't impossible, just unlikely (especially considering Eb's apparent loathing of them and Drakul). But I do think that Mavra might not be completely controlled by the Outsiders, and she isn't necessarily working with the Circle and/or Black Council (which may be the same), or Cowl for that matter (who definitely is from the Circle, and possibly the Black Council). I think she is being exploited by the Outsiders, just like an angry animal, and they nudge her into helping them directly or indirectly. But I suspect her main purpose is to bring down those that ruined the Black Court and perhaps try and restore it again.
Arjan - Just pick whoever you like. I just wanted a list at the top. I suppose I could make it different groups and force people to pick which 6 they thought were most likely... I will have a look at a few possibilities and see if that helps.