Penelope-Rose "Penny" Melanie Hamilton née O'Toole Penny is the daughter of Linette and Owen Hamilton but was orphaned alongside her older brother Louis due to the Consumption which caused her and her brother to be raised by there maternal great-aunt Phyllis.

Penny is married to her first cousin Ashley O'Toole and the mother to there three children a sons named Beau and Christian, and a daughter named Linette. She died giving birth to her third and final child named Christian.