A high priest of Laduger. Associated unwillingly with Akagaur. His Duergu, Okiru, was killed by Zeron when she threatened to kill Aurora (Zeron knew that Akagaur wanted Aurora alive). Also uncle of Imrur (who he saw as a potential successor), who was slain by Jaska.
Through Imrur, Ubay has learned of two special things about Aurora.