Euphrati Keeler - History: Euphrati Keeler was a young Remembrancer from Terra who was a part of the program initiated by the Emperor to embed Humanity's greatest writers, musicians, and artists among the expeditionary fleets of the Legiones Astartes during the final days of the Great Crusade to unify the Human-settled galaxy.Their function was to chronicle all the glorious deeds of the Space Marine Legions and the Imperial Army in the course of the crusade so that the future posterity of the Imperium would know how Humanity had come to dominate the galaxy. Keeler served as an imagist (photographer).Her more famous images from this time include the rescue of Maloghurst from the surface of the world designated Sixty-Three-Nineteen, and Garviel Loken taking his Oath of Moment before the Battle of the Whisperhead Mountains, the final battle that completed the Imperial Compliance campaign for that world. She and other Remembrancers were allowed to travel to the surface of Sixty-Three-Nineteen during that final battle, though they were meant to go nowhere near the actual combat. On an impulse, Keeler's group of Remembrancers slipped away from their Imperial Army escort and entered the final rebel stronghold in the Whisperhead Mountains.While in the tunnels of the rebel outpost, Keeler was shaken by an encounter with the Daemon calling itself Samus in the Whisperheads. The daemon possessed the body of Luna Wolves Sergeant Xavyer Jubal and proceeded to kill the entire group of twelve accompanying Luna Wolves Astartes except for Keeler and the Imperial Iterator Kyril Sindermann. Though the incident was covered-up by the Warmaster Horus, the terrifying experience may have later contributed to her eventual decision to join the Lectitio Divinitatus, a widespread cult across the Imperium that rejected the materialist doctrines of the Imperial Truth and worshipped the Emperor of Mankind as a deity, prefiguring the rise of the Imperial Cult.Her growing devotion to the Emperor as a god in the wake of the incident in the Whisperhead Mountains became clear later when Kyril Sindermann accidentally summoned a Daemon, in this case a Horror of Tzeentch, using a copy of the Book of Lorgar in the library of the Vengeful Spirit, Horus' flagship. Keeler stood before the creature with the symbol of the Aquila and banished it back into the Warp with the power of her faith.Following the banishment, she collapsed into unconsciousness for an extended period of time, entering what could only be described as a restorative coma. But news of her miraculous deed spread through the 63rd Expeditionary Fleet, leading the many Divinitatus members covertly present in the fleet to see her as "the Saint," the venerated Prophet of the Emperor. She became a target of Horus' assassins after his turn to the service of Chaos, including Maloghurst's enforcer Maggard. She awakened from her catatonia shortly before the Isstvan III Atrocity, and warned that something dark had grown within the confines of the Warmaster's Legion.Keeler escaped the 63rd Expeditionary Fleet and Horus' slaughter of all the other Remembrancers present on the Vengeful Spirit with Mersadie Oliton and Kyril Sindermann aboard the Imperial frigate Eisenstein that was commandeered by the Loyalist Death Guard Battle Captain Nathaniel Garro. Keeler and the others had only escaped the Vengeful Spirit with the help of the Luna Wolves Captain Iacton Qruze, who she approached for help after witnessing the Traitors' bombardment of their own Loyalist brethren on the surface of Istvaan III. Keeler became an increasingly avid proponent of the Lectitio Divinitatus during the journey to Terra.Her faith in the Emperor would prove to be so absolute that it would provide psychic protection against the powers of Daemons summoned from the Warp. After she arrived on Luna, she was taken into custody by the Sisters of Silence, who believed her to be a renegade psyker. She was interrogated by them within their fortress on Luna known as the Somnus Citadel.As the Heresy progressed, Keeler gained great sway over the masses of the Imperium as she was increasingly identified simply as "the Saint." She began to spread the teachings of the Lectitio Divinitatus across the homeworld of Mankind, bringing millions of new followers into the faith. Horus ordered the Vindicare Assassin Eristede Kell to kill her and thus badly damage the morale of the Loyalist population of the Imperium and unleash the chaos of religious strife on Terra before his final assault on the Throneworld.Kell had originally been sent along with four of the other greatest Imperial Assassins to kill the Warmaster on the world of Dagonet, but the plan failed, and after several standard years of hiding aboard the Vengeful Spirit, Kell was eventually captured and turned to the service of Horus.The Warmaster returned Kell to Terra but his attempt to assassinate the Saint was ultimately foiled at the last moment by Nathaniel Garro, now one of Malcador the Sigillite's Knights-Errant. Afterwards, Keeler was taken under the Sigillite's personal protection, despite her repeated violations of the Imperial Truth, largely because Malcador wanted to see if the supernatural abilities produced by faith in the Emperor could be used as a weapon against the forces of Chaos.