Catherine was among those who retired to the Sandy Coves Convalescent Home. She was among the many there to experience her age; experiencing dementia, she (like the others dwelling there) would occasionally lose their safe key. Prompting their caregivers to program the Mister Handy robots to remember where they habitually hide it. In her case, among her cat bowls. She was a lonely old woman who filled her room with feline art.
On the morning of Saturday, October 23, 2077 she was awake, noticing the blasts of the nearby nuclear detonations she overturned her mattress to shield herself from the heat and light. However, this wasn't enough to save herself from the radiation that swept through the facility, killing the occupants where they were. Her skeleton lies where she took shelter.
Catherine is mentioned only in Fallout 4.