Mimbari are a highly advanced race both technologically and militarily. Their race consists of three castes, the warrior, the worker and the religious. The governing body is call the Grey Council made up of 3 members from each of the casts. They are a religious people who worship the universe which they consider sentient and evolving. They also venerate spiritual prophets, the most famous of whom, Valen, created the Grey Council. The Grey Council rules from the war cruiser Valentha, which circles the Mimbari homeworld.