Penny is a 12-year-old Lamplighter who spends most of her time alone in a corner of the slave house. She laments that Rory Maclaren, whom she has grown close to, has been in isolation in the Box for a very long time and will likely die if he's not released. When not enslaved, Penny is another scavenger team member from Little Lamplight. She's adept at finding food and understanding animals in the wasteland, although this particular talent wasn't of much use when slavers stumbled across their team. At Lamplight, she spends a lot of time with her brother Joseph, who's her hero; even though she can usually take care of herself, she admires the way Joseph seems to know everything, and she tries to be like him.
Penny refuses to leave without her good friend Rory. It is optional for the player to either help Rory, or convince Penny to leave without him by passing a speech check. Rescuing Penny from Paradise Falls will make her brother Joseph more inclined to help you get into Vault 87, through the method that only he can unlock. After saving Penny from Paradise Falls and talking to her in Little Lamplight, there is an amusing dialogue path which reveals that her real name is Penelope.