Penny is Inspector Gadget's 14 year old niece, an inspector in training. She is brave, clever and willing to fight villains. Her only weakness is Talon, Dr. Claw's handsome nephew. But even though she has a crush on him she never lets him get away with his and his uncle's evil plans. Unlike other Inspector Gadget productions, she now joins Gadget in his assignments and despite the title, she is the protagonist.
- Penny, alongside Inspector Gadget & Brain will meet Emerl & his friends in Team Robot's Misadventures Of Thomas & Friends: Tale of the Brave & Team Robot in Pokemon XY The Series.
- Penny is voiced by Tara Strong, who sounds alot similar to Twilight Sparkle.