The Ssi-ruuvi Imperium was the government and holdings of the Ssi-ruuvi. The Shreeftut, leader of the Imperium, reigned over a large swath of the Unknown Regions known as the Ssi-ruuk Star Cluster from the capital of the Imperium, Lwhekk. The Imperium was also governed by the Conclave and the Elders’ Council.

When the Ssi-ruuk expanded into space, they conquered several worlds and enslaved their inhabitants, most of which were primitives. Eventually, the Ssi-Ruuk discovered the art of entechment and began entrenching subjugated species. The practice of entechment of lower life forms became common; even the P’w’eck, cousins of the Ssi-ruu were used. But gradually it was learned that containment of these «souls» for long periods would result in madness and it was decided that the Imperium needed to expand its realm once again. Another reason was the dwindling resources in their isolated region of space.