In the mirror universe, Monor was a Cardassian gul in the Klingon-Cardassian Alliance who lived during the 23rd and 24th centuries. Monor took command of the planet Ardana when the Alliance crushed the Terran Republic in 2295.
Since the world had been drained of zenite by the Terran Empire, Monor, a scientist, converted the Ardanan facility Stratos City into a place of research, which he called Monor Base. Monor died of old age in his bed. (VOY - Mirror Universe novel: The Mirror-Scaled Serpent)