Annie Carpenter

 was a con artist, She thought Orm was made up. She was pregnant. She was possessed by the Scourge and converted into the Scourge Bridgehead. Bernice Summerfield managed to use a nerve gas so that Annie conciousness could reassert itself. She then created a a telepathic conference between Benny and the Seventh Doctor, but the Scourge managed to regain control when the gas ran out. Later she stepped into the TARDIS and her conciousness was permanently realigned and Benny used this to help the Doctor escape. She was in a relationship with Michael Pembroke. (AUDIO: The Shadow of the Scourge)