== Gzhindra == 

 In The Pnume, it's made fairly clear that the Gzhindra are exiled and/or ostracised Pnumekin who now dwell as ghian in the ghaun. In other words, they're former Pnumekin. They aren't explicitly described as upper class, and, in fact, Zap210 makes allusion to the fact that she would be forced to live above ground as a Gzhindra now that she has seen "secrets".