Emperor Gruumm is the leader of the Troobians, a planet-conquering alien force. He is evil, and destroys everything in his path. He destroyed Sirius, the home planet of Anubis, and now his next target is Earth. Gruumm seeks toagainst Anubis as well as conquer the Earth. However, it turns out that he is answering to a higher power that he refers to as the Magnificence.