It's been 4 days. Claudia went out this morning to look around, and never came back. Then Mr. Cob went out to look for her, and HE never came back.
”— Carrie Delaney
Claudia was one of the adults accompanying the children from Early Dawn Elementary at their field trip to Lamplight Caverns on the day of the Great War, October 23rd, 2077.
After the bombs fell she and a few others ventured out into the wastes to search for help, never to return. It is not made clear whether she was a Teacher or one of the parent-chaperones.
Claudia is mentioned only in Fallout 3.