E.V.E.

E.V.E. (short for Exceptionally Versatile Evolvanoid) was the first robotic creation of her kind developed by Dr. Ivo Robotnik to learn, think and adapt to new situations. She was created using body cells from Sonic the Hedgehog and brain cells from Dr. Robotnik, as well as nearly-indestructible sub-microscopic components and chips. E.V.E. faced Sonic numerous times, each time being defeated only to return stronger and more prepared. However, E.V.E. eventually realized she could exceed her programming and shot Dr. Robotnik into an alternate dimension. She then proceeded to leave Mobius to explore the universe. Years later Sonic discovered her while in space, disappointed to find out she was destroying entire planets. Sonic convinced her that what she was doing was wrong, and thus she flew into the heart of a sun, destroying herself and penance for wiping out entire societies.