Like most of the family on Hal's side she has a dislike for Lois and appears to be snobby and rude woman and is married to Hal's brother in-law Tom. She only appeared in "Family Reunion", where she plotted with her sister, Amelia, to get Lois out of the family portrait. They succeeded at their plans, but they didn't get off Scott-free. The boys got revenge on them by destroying their specially baked cake.
- It is unknown what her married name is.
- It's implied that like the rest of her family and even Lois' own parents, Claire wanted Hal to marry Susan