harleygrenade:

“Vision is a powerful android born by the result of the synthetic Vibranium body created by Ultron and Helen Cho, and programmed by Tony Stark and Bruce Banner using J.A.R.V.I.S. based codes and activated by the Mind Stone hidden inside the Scepter. However, unlike what he was originally meant to be, Vision became fond of humanity, which led him to join the Avengers to stop Ultron. After the War against Ultron, Vision formally became a member of the Avengers under the leadership of Captain America.”