Jennifer "Jenny" Wakeman (or XJ-9) is the main character of My Life as a Teenage Robot. She is a robot with the personality of a teenage girl, created by Dr. Nora Wakeman to protect the planet Earth. However, Jenny desires to live the life of a normal teenager.
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.
