Helena is a Saint of the Imperium. Raised in the Schola Progenium on Ophelia VII, she was remarkably gifted in her youth. After 30 years of service in the Order of the Key, she was raised to Canoness. After the death of the previous Prioress of Convent Sanctorum, Helena was hand-picked as her successor. Although she was not trained as a warrior, it is known for Helena to personally intervene in battle and her keen mind and tactical abilities are displayed in their full.
Helena eventually died of unknown causes. Her remains and sacred relics were buried in a shrine, bearing her name, on the Hive World Acheron IV. When the Ork Warlord Uggrot, led his Waaagh! in invading Acheron IV, Canoness Verena Armenii, of the Order of the Argent Shroud, led a battlehost of her Sisters to Helena's shrine to recover any of her remains that could be found. Upon their arrival in the shrine's ruins, the Sisters were soon attacked by an overwhelming Ork force and it was only the discovery of Helena's sacred sword that turned the tide of the battle. As the remnants of the Sisters' force fought the Orks, Seraphim Superior Camille used the sacred blade to kill Warboss Grog Chewtops; causing the Orks to retreat and saving what remained of the battlehost.