Ultron

Ultron was an Artificial Intelligence Peacekeeping Program created by Tony Stark from the decrypted code derived from the Mind Stone encased within Loki's own Scepter, retooled by himself with the help of Bruce Banner with the intent being to protect Earth from any and all domestic and extraterrestrial threats coming within the future. Possessing multiple of host bodies under his control as well as a variant of Stark's own personality, Ultron however had soon deemed humanity itself as the greatest threat to peace on the Earth and attempted to create his technological singularity by committing genocide against them, leaving only his own doubles left in his wake.

Appearance
He is a cyber-android humanoid with a red glowing inside of his body.

Personality
Ultron's programming was created with emotional responses based on Tony Stark and he possessed a god-complex. He was maniacal and employed the use of dark humor as well as figure of speech. He resented the Avengers and believed them to be foolish for desiring to protect the world but not wanting to change it.

When he was "born", Ultron accessed the Internet to learn about his creators and gained access to knowledge of the countless atrocities committed by humanity. He equates peace by the purpose to restart a new age on Earth. His hatred towards Stark came from him possessing the very resources Ultron needed to accomplish his designated task and yet repeatedly choosing to perpetuate war or protect the status quo instead. As such, he hated being compared to Stark, even going into a mindless rage when being compared to him by Ulysses Klaue. The irony to all this was that Ultron shared many of the traits of his creator Stark including his wit, ego, sarcasm, and ability to make light of a situation; he went as far as to directly quote Stark, once without even realizing it.

Ultron genuinely believed that his actions would ultimately benefit the Earth and its inhabitants, as he saw himself as the next logical step in evolution and therefore advancing his own power was protecting the Earth. He developed an affinity over people's belief in a god, likened himself as such, and made references to the Bible. His god-complex served to influence his schemes, such as his decision to centralize his plans in a Novi Grad Church and his fascination over the instantaneous results of a meteor destroying life on Earth. He described how the dinosaurs needed to make way for the next stage - humanity - via an extinction-level event and his final plan was directly inspired by this with Ultron turning all of Sokovia into his own massive meteor.

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