Penny (The Pyramid at the End of the World)

Penny was a girl who went on a date with Bill Potts.

History
After the Twelfth Doctor told Bill to call Penny, (TV: Extremis) they went on a date, in which Bill told her about her tutor being an alien and the computor simulation he was recently traped in. Later, they went to Bill's flat, but their date was interrupted when several United Nations soldiers came in, looking for the President of Earth. (TV: The Pyramid at the End of the World)