Penny is also very knowledgeable; for example, in "Clear Case", when she and Brain are in a laboratory of a diamond mine in South Africa, she knows how M.A.D agents are making invisibility suits to scare off miners by making them think they are ghosts. Penny is Inspector Gadget's niece and one of the main protagonists of the franchise. Penny secretly helps out her Uncle Gadget with his missions and does all the work, but she lets him get all the credit in the end.