Mercury is a young lady who was created by the Founder of Fatali Stellae for an unknown purpose , though theories circulate between the high ranking members of the organisation that she was a personal project of his. She is an artifical intelligence, unique to the other Lesser Ranks who are formed through the process of converting mortals/victims, extracting the soul from their bodies. The Founder often considers Mercury as one of his children, though Mercury doesn't quite understand the concept yet. Outside of missions, she demonstrates a far more happy and humane side far from the personality she was created to have; cold and merciless.