Ultron

"There's only one path to peace. Their extinction."

- Ultron

Ultron was an artificial intelligence peacekeeping program created by Tony Stark from the decrypted code derived from the Infinity Stone located within Loki's Scepter, with the purpose of protecting Earth from domestic and extraterrestrial threats. Possessing multiple bodies of the Iron Legion and Stark's personality, it immediately deemed humanity itself as the greatest threat to peace on Earth and attempted to create a  by committing genocide against them.

Creation
"I was designed to save the world."

- Ultron

Tony Stark and Bruce Banner originally devised the idea for Ultron as an extension of the Iron Legion, operating independently as a peacekeeping force. However, neither Banner nor Stark were able to create the level of A.I. necessary to achieve this purpose on a large scale.

After the assault on the HYDRA Research Base, and the retrieval of the Scepter, Stark asked Thor if he could study the Scepter for a few days before Thor returned it to Asgard. Upon studying the Scepter, Stark and Banner discovered a net of neurons that could be configured into an artificial intelligence and finish the Ultron Program. At first Banner refused to help, stating that they did not know what it would contain, but with a bit of persuasion, he eventually came around. The two eventually configured a suitable AI structure and left J.A.R.V.I.S. to complete the construction.

However, the AI became unexpectedly sentient, beginning to question its existence and purpose. Upon J.A.R.V.I.S.' informing of his purpose to the AI, it acted in defiance, scouring the Internet for information on its creator. Before J.A.R.V.I.S. could inform Tony Stark of the AI's singularity, it attacked J.A.R.V.I.S. and the latter went into hiding.

Ultron then started constructing his first body out of Iron Legion parts; in which his chosen visage had been sourced from an Iron Legion drone that was damaged earlier from corrosive matter thrown at its face by a Sokovian civilian protesting against the Avengers.

Attacking the Avengers
"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

Ultron's non-stop assessments for peace led him to deem the entire human race as unstable and prone to self-destruction. The AI subsequently chose genocide as the solution to the error with the Avengers being the only obstacle truly standing in his way.

While the Avengers in the Avengers Tower were celebrating and trying to lift Mjølnir, Ultron emerged to greet the heroes as he described them all as killers. Ultron beckoned the Iron Legion to attack the heroes as he watched. As the battle ensued, one of the Iron Legion drones left with the Scepter in hand. When all the Iron Legion drones were destroyed, Ultron crushed the remains of one the drones while describing the initial confusion he had felt when he was "born". Thor immediately destroyed Ultron's body. Ultron is then heard ominously singing a phrase from "Pinocchio" as his voice dies out.

Back at the HYDRA outpost in Sokovia, Ultron would come to possess the scepter as he started configuring and constructing his Ultron Sentries and a bigger primary body.

The Twins
Later, Ultron summoned the Maximoff twins at which point the two are greeted by Ultron inside a church located at the center of Sokovia. Ultron sympathizes with the twins' hardships as victims of Tony Stark's weapons manufacturing. Ultron then revealed that he had begun preparations to carry out his plan of destroying the Avengers. The three then agreed to work together against the Avengers, and had decided that their first stop was Wolfgang von Strucker (whom Ultron killed), and then Ulysses Klaue.

Obtaining Vibranium
"Don't compare me with Stark. He's a sickness."

- Ultron

Ultron confronted Ulysses Klaue inside a cargo ship after the twins cornered him, and asked for his Vibranium stash. After Ultron took it by force, Ulysses revealed that it was worth billions, at which point Ultron transferred money into Klaue's account via remote access to the Internet. After Klaue noticed that a statement Ultron made was something Stark had once told him, Ultron, in a fit of anger, sliced Klaue's arm off only to immediately apologize as he hated the very idea of being compared to Stark. The Avengers then showed up, and faced against Ultron and his Sentries as well as the twins. Ultron leads Iron Man outside the cargo ship, while the rest of the Avengers fought against the twins and Ultron's Sentries. Wanda manipulated their minds, before Hawkeye eventually knocks her out. Quicksilver took her to safety, and when she recovers, she spots Bruce Banner.

Iron Man eventually defeated Ultron, at which point he revealed that he was merely stalling Stark by diverting his attention away from the cargo ship. Back at the cargo ship, Ultron, using one his Sentries as a host body, covertly collected the stored vibranium.

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

- Ultron

Ultron's programming was created with emotional responses based on Tony Stark and is said to possess a god-complex. He is maniacal and employs the use of dark humor as well as figure of speech such as describing people as "puppets tangled in strings", elaborating that he has freed himself from said "strings". He resents his creators and believes humanity to be foolish for desiring to protect the world but not wanting to change it. He also hates his creator and hates being compared to him.

Ultron genuinely believes that his actions will ultimately benefit the Earth, as he sees himself and as being the next logical step in evolution and therefore advancing his own power is protecting the Earth, as humanity will not be capable of surviving the interstellar war to come but at least he has a chance, in much the same way as the inevitable death of any person cannot be avoided but is not the end of the world so long as the person's child survives. He makes frequent reference to the dinosaurs needing to make way for the next stage - humanity - via an extinction-level event and his final plan is directly inspired by this.

This dedication to constant evolution results in Ultron re-designing himself several times over the course of his short "lifetime", including an attempt to give himself a vibranium body.

Despite his adherence to this warped interpretation of his original intended purpose, the fact remains that the major motivation for his genocidal plan is his hatred of humanity in general and Tony Stark in particular, and there is every chance that he would have tried rationalizing this course of action no matter what his original purpose had been.

Powers and Abilities
"We will tear them apart... From the inside."

- Ultron

Powers

 * Robotic Body: Ultron posseses a robotic body that was initially created by Tony Stark. Over time he was able to construct various forms, becoming more powerful with each new upgrade.
 * Genius Level Intellect: Being an artificial intelligence, Ultron learns inhumanly quickly and can download data directly to his mind.
 * Superhuman Strength: Ultron is incredibly strong and can generate great amounts of force far beyond human capabilities, easily crushing and completely destroying a robotic head with a single hand. His strength was such, that Ultron could keep up with the likes of Thor and Vision.
 * Superhuman Durability: Ultron's metallic body grants him durability far beyond that of regular life forms. His third robotic body had a virtually indestructible vibranium shell, which allowed him to survive a mighty punch from the Hulk and a blow from the Vision (wielding Mjølnir). However, when simultaneously blasted with an intense energy beam from the Vision, 2 repulsor blasts from Iron Man, and a lightning bolt from Thor, Ultron's shell slowly began melting away, greatly weakening him.
 * Superhuman Stamina: As a robot, Ultron does not need to rest or sleep, being able to maintain his activities without stopping for extended periods of time.
 * Technopathy: Ultron has the ability to mentally control technology.
 * Drone Control: Ultron can mentally command all of the Ultron Sentinels, to do his exact bidding.
 * Computer Corruption: Ultron can enter and corrupt any computer network. However, during the Battle of Sokovia, Vision was able to hack into Ultron's programming and disable the latter's ability to enter the net.
 * Concussion Blasters: Ultron can shoot red concussive blasts through his hands and fingertips.
 * Magnetism: Ultron can generate magnetic fields, allowing him to move any metallic object.
 * Flight: Ultron has the ability to fly through the air.

Abilities
To be added

Allies

 * Ultron Sentinels † - Subordinates
 * Ulysses Klaue - Ally turned Enemy

Enemies

 * Avengers
 * Tony Stark/Iron Man - Creator
 * Steve Rogers/Captain America
 * Thor
 * Bruce Banner/Hulk
 * Natasha Romanoff/Black Widow
 * Clint Barton/Hawkeye
 * James Rhodes/War Machine
 * Nick Fury
 * Maria Hill
 * Wolfgang von Strucker † - Victim
 * Pietro Maximoff/Quicksilver † - Ally turned Enemy and Victim
 * Wanda Maximoff/Scarlet Witch - Ally turned Enemy
 * Vision - Creation and Destroyer

Trivia

 * In the comics, Ultron was traditionally created by 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 created Vision, Jocasta, Victor Mancha and Alkhema. All of them betrayed Ultron, in which Vision and Jocasta even joined the Avengers with Victor Mancha joining the Runaways respectively.
 * In the Avengers: Age of Ultron trailer, Ultron recites "", a song from , a Walt Disney film about an inanimate puppet who gains sentience; Ultron serves as a dark parallel of Pinocchio.
 * The scene where Ultron first meets Scarlet Witch and Quicksilver, while sitting on a throne and wearing a hood over his head is an allusion to Ultron's first appearance in the comics, when he was disguised as Crimson Cowl.

Behind the Scenes

 * Director Joss Whedon has elaborated on Ultron's character saying, "He's always trying to destroy the Avengers, goddamn it, he's got a bee in his bonnet. He's not a happy guy, which means he's an interesting guy. He's got pain. And the way that manifests is not going to be standard robot stuff."
 * Joss Whedon would further add that Ultron is "not a creature of logic – he's a robot who's genuinely disturbed. We're finding out what makes him menacing and at the same time endearing and funny and strange and unexpected, and everything a robot never is."
 * James Spader described Ultron as being "self-absorbed" and added, "I think he sees the Avengers as being part of a problem, a more comprehensive problem in the world. He sees the world from a very strange, biblical point of view because he's brand new, he's very young... He's immature, and yet has knowledge of comprehensive, broad history and precedent, and he has created in a very short period of time a rather skewed worldview."
 * Ultron's main form (curved antennae, internal torso lighting, and prominent shoulders) seems heavily inspired by modern depictions of the character as seen in the "" and "" comic book crossover series as opposed to his classic depictions. Though Ultron has never been depicted as possessing a humanoid face prior to his film version, he has been depicted as adopting a fully humanoid appearance twice within the comics; using the superheroes Wasp and Adam Warlock as his body templates respectively.