Edward

Taken from wikipedia :

(Born January 1, 2058) The self-invented personal name of an elite hacker prodigy from Earth. Her birth name is Françoise. "Radical Edward" is a very strange, somewhat androgynous, teenage girl claiming to be around 13 years in age. She has a feral aspect reflected in her mannerisms, bare feet, strange postures and gangling walk; she raises one arm at the shoulder while raising the other leg which remains bent at the knee, then kicks it out, transfers her weight onto it, and repeats the motion with her other leg. Ed could be considered a "free spirit"; she is fond of silly exclamations and childish rhymes, easily distracted, and the show's primary source of physical humor. It is presumed she has a personality disorder similar to ADHD but this is never specified. Over the course of the show she rarely walks anywhere, preferring to run, crawl, flip, roll, walk on her hands, ride piggyback, or at the very least saunter. Ed wears a very loose sleeveless shirt and very tight violet bicycle shorts but is always barefoot; she uses her feet for tasks which one would usually use hands, such as scratching her nose, clapping, and typing, and it seems she has followed this habit throughout her life: even during a flashback of several years ago wherein she appears to be around 7-9 years in age, she wears a dress over her usual loose shirt and shorts but is still barefoot. In one episode, she considers putting on socks and shoes, but quickly removes them, as even wearing socks hampers her, and she falls over seconds after putting them on; she also appears to be exceptionally strong and flexible, being able to support her weight on her arms for several minutes at a time, and to scratch her nose with her toe.