Mother Grace (real name: Grace Spivey) is a charismatic leader of a fanatically religious Christian cult known as the Church of the Twilight (also known as the Servants of Twilight) who are determined to murder Joey Scavello whom she believed to be the Antichrist and she is the main antagonist of the Dean Koontz novel The Servants of Twilight (originally called Twilight) and its 1991 movie adaption Servants of Twilight. She was portrayed by Grace Zabriskie whose first name is the same as the fictional character's.