Nothing is known about Mary Anne's life prior to or as the outbreak began.
Mary Anne is among the injured workers in Tank Town after a massive explosion ripped through the oilfield. She managed to make it inside one of the other buildings where the injured have gathered. June provides Mary Anne with medical treatment despite Virginia's attempts to question her. She was moved to the medical trailer with the other injured awaiting evacuation when it was revealed that some of the injured had died and turned on the other survivors in the trailer, killing everyone, including Mary Anne. Her reanimated self was then put down by June.
- Killed By
The Doomsday Cult attacked Tank Town thus leading to Mary Anne either dying from her burns or one of the reanimated patients in the trailer.
- June Dorie (Zombified)
After reanimating, Mary Anne was stabbed in the head by June.
This list shows the victims Mary Anne has killed:
- Despite being named and having speaking lines, Mary Anne remains uncredited.