Sister Mary Eunice McKee (Lily Rabe) was initially presented as one of the more innocent characters in Asylum. Though she worked under Sister Jude, she spent a lot of time assisting Dr. Arden. During an exorcism, Sister Mary became possessed by the Devil, which greatly affected her demeanor. She was violent and manipulative, carrying out plans to take over Briarcliff. Monsignor Howard attempted an exorcism on her when he realized she was possessed, but it didn't work. When the real Sister Mary broke through, she begged the Monsignor for death as an act of mercy. He threw her down the stairwell before the Angel of Death fulfilled her wish.