Penny was a rich heiress who preferred working out with her boxing trainer Pug, to going to fancy parties. At her "coming out" party, she brought Pug as her escort (just to stir controversy) and stopped a jewel theif. She then decided to open a detective agency. She mostly helped her wealthy friends solve crimes involving their money. Pug accompanied her on investigations. Penny was very athletic and a good enough boxer to knock down Pug. While she did not carry a gun, she was resourceful, and usually used on-hand weapons to turn the tide on anyone who confronted her with a gun.