A Radiology nurse at the Mass Bay Medical Center she was on duty on October 23, 2077. After the first nuclear detonations struck she was effectively drafted when the military took over the facility.
After some time some of the staff found a way to escape the medical center, she however decided to stay behind. As a friend of Bonnie Tournquist she was trusted with a holotape for her husband Wayne should he have made it to Radiology looking for her.
Marcie is mentioned only in Fallout 4.