Watnul

Watnul was the last surviving member of his family. For centuries, they had had a tradition of building the most intelligent serving robots in the universe. The factory was located on the Nurburr Asteroid, a floating rock in space. The factory, once alive with robots and workers, had become quiet and lonely for Watnul over the years. His loneliness was eased in his later years by the friendship of a self-aware engineering robot that had constructed itself from spare parts in the lower levels of the factory and eventually was freed thanks to the intervention of the Tenth Doctor and Heather McCrimmon. (DWA: The Ghost Factory)