Eos was a Greater Sanctifier of the Reverse Tower of Babylon. She was created at the same time as Eosphoros as a complementary counterpart to him. As Eos and Eosphoros were created from the same template, Antonina describes them as something akin to twins. Before the events of the game she was registered as KIA.
Prior to her release as a playable Agent during the Entropic Dichotomy event, she first appears in the game as a disguise form taken on by Eosphoros.
