Sister Mary Eunice McKee has easily one of the most tragic stories of any character in Asylum. Introduced as the assistant to the much stricter Sister Jude, Sister Mary Eunice is an innocent, naïve, good-natured nun who has optimistic views of the church, hospital, and all Briarcliff staff. She is one of the few employees who shares common ground with both Nurse Jude and her main competitor, Dr. Arden is friends. However, Satan soon possesses sister Mary Eunice, changing her personality from shy and introverted to sneaky, cruel, and power-hungry. Under Satan’s control, she begins plotting to take over the hospital and happily murders anyone who stands in her way – patients and staff alike – to do so.
Given her drastic mid-season personality change, Sister Mary Eunice is a somewhat difficult character to map to a zodiac sign. However, it is likely that her character is closest to Leo. This fire sign is known for being warm, loving, and caring, much like Mary Eunice in the early episodes of Asylum. They are also natural show boats, easily recognized for their flamboyant personalities. This is particularly seen with Mary Eunice after her obsession, when she takes on a much bolder, more complex personality, manipulating numerous people and hiding behind her mild-mannered looks.
A Leo’s main desire is to be the center of attention. They have a reputation for being swaggering and overly talkative, which applies to Mary Eunice, who constantly flaunts her victories over her enemies, like Sister Jude and the monsignor, whom she actively seeks to corrupt. Like the Satan-controlled Mary Eunice, lions hate being bossed around and will usually lash out at anyone who tries to take control of them.