In Exiles at the Well of Souls, Mavra Chang was captured by the Olborn, who use magical stones to convert beings into beasts of burden.
After multiple attempts to escape, she has been reconditioned to accept her existence, and a maimed Glathrielite, Joshi, has undergone a similar partial transformation in Olborn to serve as a companion for Mavra.
Antor Trelig was a politician as well as the head of the sponge syndicate, in control of a significant fraction of the council governing human space.
Renard was the librarian on Trelig's resort planetoid of New Pompeii, which was subsequently transformed into the home of Obie, the supercomputer capable of using Markovian physics to manipulate the universe.
Obie returns to human space, and when a Council fleet arrives to destroy him, he fakes his own destruction and departs with Mavra to explore the rest of the universe as partners.