Blackie, from Ultima Underworld II
After being told by several Trilkhai in Ultima Underworld II to talk with her, the Avatar found her in the stables. Blackie told the Avatar that they were all pretty much work slaves to do all the heavy hauling, and hid their intelligence from everyone. Blackie wanted the Avatar to find out, if there was any truth that their kind had a much better past.
In the Ethereal Void the Avatar much later got the answer from a Xorinite Wisp, who told the hero that the Trilkhai had once been space-faring humanoids, but a huge war had ruined them, so they had regressed to the point that they had lost the ability to use tools.
The Avatar brought this news to Blackie, who felt a lot better when hearing this, and hoped she could now rally her kin against their oppressors.