Regan MacNeil

Regan Teresa MacNeil was one of Pazuzu's most important possession victims. He first came to her when she was 12 years-old, after she had dabbled with a Ouija Board. Her mother had to called to priests to come and save her and got Pazuzu out of her body. Eventually the two priests died and Regan does not remember her ordeal. She and her mother left Georgetown

She appeared in Exorcist 2 The Heretic, She is 16 years old. She finally confronts Pazuzu with the help of Father Philip Lamont. Her guardian Sharon Spencer died at the end of the movie.