Lucy was the daughter of Morticia and Hannibal Grandchester. According to a legend, she killed her parents and was put into a mental asylum. She escaped on her 18th birthday and was found hanging in the attic of the Grandchester Mystery Mansion nine days later in an apparent suicide. Her ghost haunts her family mansion, which was turned into an attraction for Nuka-World. Her ghost can be seen around the mansion several times, disappearing into dead ends when the Sole Survivor comes close.
If the player encounters the ghost while in a battle, Lucy may run, leaving her scripted path and running to other parts of the house.
Despite being eighteen when she committed suicide in the mansion, the ghost of Lucy is that of a child.
If the player gets close enough to the upper front window of the Manor while Lucy is standing there and looks at the ceiling of the room she is in, they will see that Lucy's shadow has a set of wings that appear to be fluttering up and down.