Ultron

"But now I'm free. There are no strings on me."

- Ultron

Ultron is an artificial intelligence created by Tony Stark. Possessing an eight-foot tall advanced robotic body, Ultron was created by Stark with the purpose of protecting Earth from threats, but eventually deemed humanity itself as the greatest threat to Earth and attempted to create a  by commiting genocide against them.

History
"How could you be worthy? You're all killers. You want to protect the world, but you don't want it to change. There's only one path to peace: your extinction."

- Ultron

After Tony Stark destroyed the Iron Legion in order to appease Pepper Potts after the Battle on the Norco, he created Ultron in order to give himself and the Avengers a break from heroics. He, along with the Ultron Sentinels, was programmed to safeguard humanity from all threats. However, Ultron's non-stop assessments for peace eventually deemed the entire human race as unstable and prone to self-destruction, and deemed them unfit to exist; the AI subsequently chose genocide as the solution to the error.

Abilities
Tony Stark created Ultron with the ability to upload its programming into other bodies if the original is destroyed. Ultron's programming was created with emotional responses based on Stark's. He is also quite maniacal and uses dark humor and figure of speech such as describing people as puppets on strings and that he is the only one without strings. He resents his creators and thinks people as killers and fools for not wanting to change the world but trying to control it.

Relationships

 * Ultron Sentinels - Subordinates
 * Vision - Creation and Enemy
 * Avengers - Enemies
 * Iron Man - Creator
 * Captain America
 * Thor
 * Hulk
 * Hawkeye
 * Black Widow
 * S.H.I.E.L.D. - Enemies
 * Nick Fury
 * Maria Hill
 * Quicksilver - Ally turned Enemy
 * Scarlet Witch - Ally turned Enemy

Trivia

 * In the comics, Ultron was traditionally created by Dr. Henry Pym; however, Joss Whedon has stated that in Avengers: Age of Ultron, Ultron's origin will be different, relating more to the current roster of Avengers already established in the Marvel Cinematic Universe.
 * In the comics, Ultron was the most personal adversary ever faced by the Avengers, being directly responsible for many misfortunes the team has faced. Given that fact, his presence in the film makes the possibility of a darker outcome much more likely.
 * In the comics, Ultron created the Vision and Jocasta (his humanoid 'mate'). Both Vision and Jocasta betrayed Ultron and joined the Avengers.
 * In the Avengers: Age of Ultron trailer, Ultron recites "I've Got No Strings", a song from Pinocchio, a Walt Disney film about an inanimate puppet who gains sentience; Ultron serves as a dark parallel of Pinocchio.