Siebert's Daughter

This girl is the daughter of President Siebert, the president of the California Institute of Technology and his daughter.

She and her parents own several dogs.

She was mentioned in "The Monopolar Expedition" (S2E23) when her father sent Sheldon on a three-month expedition to the, and was annoyed when Sheldon visited the family at their home in the middle of the night. Her mother eventually set their dogs on the unwelcome visitor.