The Emperor

Several individuals and entities claim the title of emperor and several other individuaals, however an entity known as the Emperor is the mythical leader of the Dark Ones and considers itself the reincarnationof the Dark One. This entity suposedly commands the Dark Ones aka the Imperials. It is this entity that created the Imperial Fury Hounds.
 * The Thauran Emperor
 * The Pan Saran Emperor

Three brothers of sather escaped their pocket universe. One became the leader of another sentient species, the Imperials and raised them to Techlevel 12 . They became the Dark Ones and this brother leading them became known as the Emperor . He wanted to become the vessel of the reinarnation of the Dark One and his Dark Ones conquered and destroyed many thousand civilizations in order to find the 12 tokens and to prevent any other society to bring forth a suiteable vessel for the Dark One, other than himself.