the identity of the model for the Watcher was the Chief Archivist of Ananemsis Aynder, and, a little bit of Ancient social norms are revealed, namely, the social traditions surrounding their masks and when it was appropriate to take them off - removing their mask was basically a signal to others they were about to make a big decision, asking someone for help, or when they're in the private company of friends and family. No wonder as the Ascians they continued their obssession with them.
There is a brief reference to WoL!Azem too, but it seems Venat was even more of a hellraiser in the role - no wonder the WoL is like they are, like teacher like student.