Emperor-worship is the religion of the Race. It is centered around reverence for the spirits of emperors past. Its theology is simple: if citizens of the Empire (regardless of species) obey the reigning Emperor's authority, the spirits of his ancestors will look after the spirits of the faithful adherents in the afterlife. It is the only religion practiced on Home, Halless 1, or Rabotev 2.
Emperor-worship proved unpopular when Atvar attempted to introduce it to Tosev 3. It was met with staunch opposition by Tosevites in most of the territories ruled by the Race, especially by adherents of monotheistic religions. It was flat-out banned by the leaders of all the not-empires but the United States. The United States gave the Race permission to set up shrines in its territory under the Free Exercise Clause of its Constitution. By the early- to mid-twenty-first century, it had developed a significant following in the state of California.
Emperor-worship is practiced by the Rabotevs and Hallessi, who are full citizens of the Empire and who accepted it because it resembled similar belief systems in place in their cultures when their planets were conquered by the Race. It is also practiced by Kassquit, the Empire's first Tosevite full citizen.