Editing Setting:Brighthammer 40,000/2nd edition (section)

=== The Adeptus Sororitas ===
The Brides of the Emperor: The Adeptus Sororitas.

In a universe filled with the hubris of powerful psykers and laughing tyrant gods, the emperor's secret service is sometimes not enough. Mankind needs protection against the powerful forces of the warp and the lords of Order, and sometimes, darker things.

The Emperor found a solution in a group of women fanatically devoted to the Imperium – the Adeptus Sororitas. Using his own godlike abilities, he infused them with a small part of his own essence – forever binding them to him, but protecting them from the crushing powers of the warp, and in those who are already psykers, awakening great power within them.

The Adeptus Sororitas are all women for the same reason Space Marines are all men. The process of becoming one will only work for a woman – the genetic enhancements and psychic soul-binding process will kill a man. The Adeptus Sororitas's legendary resistance to the powers of psykers and their influence simply do not transfer over to men – nor, indeed, to all women. Of the trillions of women in the Imperium, only a select few can become the Brides of the Emperor.

The secret behind what women can become Sororitas is in training – a kind which can last a lifetime – and above all else, an unyielding, unshakable faith in mankind, the Imperium, and the Emperor of Man. The Emperor's Binding brings it's great resistance to the powers of psykers because of that faith, but it requires rigid self-discipline, courage, and self-confidence as well as humility. Few can master the mindset necessary – and fewer still can master it sufficiently to become truly able to resist the most powerful psykers.

Those that do master themselves, however, find that they have joined one of the most powerful organizations in the Imperium, responsible for the protection of humanity from the threats of the warp. They are given access to the most rare and powerful forms of rediscovered powered armor, the latest weapons, and powerful space fleets. Alongside the Space Marines, they were the force that first broke the forces of Order during the Great Crusades, in their earliest form as the Sisters of Silence.

The Sisters of Silence still exist today, as a smaller part of the Adeptus Sororitas.