Janie

Janie was a schoolgirl who found Graphon Narmolis (taking the form of an inanimate pencil) and used him to help write her homework on the Solar System (including details of the planet Speldron). Wanted by the Shadow Proclamation, Graphon Narmolis used his psychic influence over Janie to remain hidden until he was tracked down and neutralised by the Eleventh Doctor's mind. With his influence broken, Janie was returned to her normal self as if she had been dreaming. (DWAM: Pencil Pusher)