The Emperor of Mankind is the leader of the human Imperium, and Father, Guardian, and God of his race. He has sat immobile within the Golden Throne of Terra for ten thousand years. Although once a living man, his shattered body can no longer support life, and remains intact only by a combination of ancient technology and the sheer force of his will, itself sustained by the soul-sacrifice of countless millions of psykers.
His will is omnipotent, extending across the million worlds that comprise his Imperium. For ten thousand years the Master of Mankind has served mankind, simultaneously carrying out a multitude of tasks vital to its survival and to the survival of the Imperium. All at once he guides his race through the Emperor’s Tarot, soul-binds psykers, holds audiences with his most important servants and beams the Astronomican beacon. His immense psychic powers constantly keep the Chaotic powers of the Warp at bay, preventing their intrusion into the material universe and protecting his people throughout the galaxy.
In the millennia since his ascension to the Golden Throne, the Emperor has become a god to his people, the worship of him uniting humanity throughout his Imperium, superstition and dogma replacing his doctrine of Imperial Truth.