Adrastia is a senior-ranking Inquisitor of the Ordo Hereticus. She, alongside Lord General Castor of the Imperial Guard's Cadian Shock Troops, were ordered to the Sub-sector Aurelia to investigate charges of heresy levelled by Captain Gabriel Angelos of the Blood Ravens Space Marine Chapter against his Chapter Master Azariah Kyras. She hoped to complete her investigation ahead of the arrival of an incoming Exterminatus fleet, which had been given orders to enact Exterminatus upon all of the sub-sector's worlds to remove their growing Chaotic and xenos taint from the Imperium. Her mission was one of dire importance as it would determine the fate of the sector. However, as a Witch Hunter, she deemed the accusation against Kyras to be extremely serious and warranting investigation -- a hereti