The Sisters of Silence were the order of psychically-null warrior-women who stood as the Imperium's shield against the corruptions of the warp. Each was a Pariah, born with the rare and unsettling gift of the untouchable soul, a presence that smothered witchfire and left sorcerers gasping, their powers guttering like snuffed candles in her presence.
Bound by vows of silence, they spoke no word, communicating through gesture and script, their muteness a discipline that mirrored the terrible absence they carried within. Alongside the Legio Custodes, they served as the Emperor's chosen instrument against rogue psykers, daemons, and the hidden witches who threatened His great work, hunting such threats across the compliant worlds of the Crusade.
At the Council of Nikaea they stood as living proof of the perils of unchecked psychic power, an argument in flesh against the sorcery the Emperor sought to curb. Yet when the Heresy broke, the Sisters of Silence found their solemn purpose tested amid the ruin of everything they had sworn to protect.