Vision is a Marvel Cinematic Universe character, debuting in Avengers: Age of Ultron.
Background[]
Vision was built by Helen Cho, who was commissioned by Ultron to make a new body for himself. When Scarlet Witch looked through his mind, she saw destruction and learned of Ultron's true plans. She, Quicksilver allied themselves with Captain America. As Hulk and Iron Man tried reprogramming him, Steve, Wanda and Pietro attempted to stop them from bringing Vision to life. However, Thor stormed in and brought vision to life by applying lightning from Mjolnir to Vision. At first, the team was reluctant to trust Vision because of fear that he would end up just like Ultron. However, he proved that his desire to protect the Earth was genuine and showed he was trustworthy by being able to pick up Thor's hammer. It caused most of the Avengers to remain dumbfounded for a while before Thor said they could trust him.
Over time, Vision became more human and fell in love with Wanda Maximoff.