Uran

Atom's robotic sister with a shown adoration towards Atom; she is a superhuman robot with a naive, tomboyish personality. Constructed by Dr. Ochanomizu as a "gift" for Atom, Uran is an extremely mischievous little girl who constantly lands her older brother in trouble. While lacking Atom's weaponry and propulsion systems, she is extremely powerful (50,000 horsepower) and regularly accompanies him on various missions (or attempts to). Like Atom, she is fully capable of experiencing human emotions - though being somewhat less 'mature'.