It seems then that however many Praeses are around Earth, however many seedlings took hold whenever, whatever is embodying those in the inner reality and sending them down is doing so on a large coordinated scale. Them returning back doesn't seem to have been part of whoever's plan it is though, does it. Perhaps this is the only set that has returned because they met up with one of or the main enhanced quantal, who reacted with some thought, determination and a particular goal of asking those she thought responsible. Also had an idea of how to get into orbit, was pushed along by the intrusion of malevolent others forcing the trip, and assisted by a turn of events giving more of an ooomph than could otherwise reasonably be expected. If none of the other pairs (or singles) even met something like Alice (assuming there's even more around than Alice and Sedna (and Church) in the first place) or something killed them or who didn't know about orbiters potentially around or didn't care enough to want to find out what's going on. Then perhaps this is going to be the only return anyway. Alice seems just moreso a random happening, that Ardent found the main one or only one, and if so, then the rest of those like Ardent are not going to show back up.
Seems the AI would have to be the most likely answer so far, but why. Amends, perhaps. Do they know about Alice, or did they expect nobody would be there (or if there, able) to stop these technology-enhancing moles. Which if so, all Pate had to do was wait to get what he wanted.
Whatever Alice is, whatever they are, it would appear some q-entangled version of an bioengineered humaniform something or another, rather than an AI. Their job being to keep some sort of order or assist those who do. How many more are there, where are they. We only know about 3 of them. And they all knew each other.
AI, Moon? Might explain the moon signal, if those nightwalkers etc are like AI pets or something. Maybe more Gavia helper types, some sort of power source for the other, maybe expendable. Hard to tell how many of the others are teams or groups or not, or why.