Sariah is a Canoness of the Adepta Sororitas' Order of the Sacred Rose. In 835.M41 she led a force of Battle Sisters to the Shrine World of Piety, which had been consumed by a Warp storm for two centuries. They found the planet almost entirely corrupted save for the Reliquary of Hope. Sariah led a mission into the labyrinth of the Reliquary, though only she herself and two Celestians returned bearing three pages of the Lexicon of Falsehoods and the left thighbone of Saint Dolan. They left the planet just before the Grey Knights arrived to deliver Exterminatus to the planet.