Subject 15

Subject 15 was a female subject of Abstergo Industries' experimentation with the Animus, who preceded Clay Kaczmarek and Desmond Miles. She faced obstacles due to her being pregnant at the time of her incarceration, as the Animus was confused by the presence of the fetus within her, and kept attempting to read the father's and the mother's genetic histories simultaneously.

Lucy Stillman eventually became concerned with the condition of the subject and advised Warren Vidic to cease exposing her to the Animus. Warren would later mention in an e-mail that something had happened to Subject 15, although it is not clearly stated whether she died nor any reference is made about the status of her pregnancy.