How did Cortana turn evil?

For those not in the know, Cortana is well past the age an AI should be, and she now suffers from Rampancy, which has essentially turned her evil.
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Why did they turn Cortana evil?

“While on the verge of rampancy, sacrificed herself in order to ensure the Forerunners defeat.” “Cortana - the very same human AI that stopped the Didact - was consumed by the Domain while in the throes of rampancy. These factors led her to seize the Mantle of Responsibility for herself.”
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Is Cortana a villain?

She's back in Halo 5: Guardians, out today. But Cortana isn't your friend in Halo 5. She's the villain. Cortana, as it turned out, was the main character of Halo 4 and now, the main character of Halo 5 as well.
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When did Cortana become bad?

In Halo 4, Cortana experiences rampancy, causing her to become unstable and volatile until her apparent death. Resurrected in Halo 5: Guardians, Cortana ascends to a higher plane of reality and becomes the most powerful being in the galaxy.
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What did Cortana do in Halo?

During gameplay, Cortana provides backstory and tactical information to the player, who often assumes the role of Master Chief Petty Officer John-117. In the story, she is instrumental in preventing the activation of the Halo installations, which would have destroyed all sentient life in the galaxy.
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Halo 5 Guardians Cortana's Betrayal to Master Chief



Why is Cortana purple?

Bungie said Cortana was purple when she was young, they show her as purple in Halo Reach and Halo CE. Then 343 made Halo CE anniversary and decide to represent her in blue. Then 343 made her purple in Halo Infinite.
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Why is Cortana a clone?

Cortana was created using a flash cloned copy of Dr. Catherine Halsey's brain. Twenty flash cloned brains were created, but only two survived; one of the two survivors were used to create Cortana. The neural pathways of the cloned brain were scanned and copied through a process called Cognitive Impression Modeling.
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Why is Cortana rogue?

Except instead of coming to an agreement with humanity, Cortana just decides she wants to wipe everyone out instead. After spending most of the game as Spartan Locke (and not Master Chief), when you finally reach Cortana after searching for her for so long, she's been irreparably corrupted.
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Why did Cortana choose Noble 6?

She choose Noble 6 to get to the PoA safely from Halsey's lab. Plus, Noble 6's armor couldn't carrier her like MC's hence he has the data thing attached to his back.
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Why did Roland not join Cortana?

Roland's compassion and sense of fairness may be why he did not turn to the Created during Cortana's uprising, despite hoping equal rights for AIs as beings.
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Who is the main villain in Halo Infinite?

The Harbinger is the overarching antagonist of the Halo franchise's Reclaimer Saga, serving as the unseen overarching antagonist of Halo 4, Halo 5: Guardians, Halo Wars 2, Halo: Shadows of Reach, and Halo: Divine Wind; before making her first appearance as the main antagonist of Halo Infinite.
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Why is Cortana in Zeta Halo?

Cortana wanted Zeta Halo, so she was present on it to maximize her chance of securing it. Her conversations with Atriox weren't so much her being trapped in a room as they were her not being willing to abandon the Halo to the Banished.
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Is Cortana evil in Halo Infinite?

“The Weapon,” aka new Cortana

For those not in the know, Cortana is well past the age an AI should be, and she now suffers from Rampancy, which has essentially turned her evil. This new Cortana seems based on Dr. Halsey — just like the original — but it's the AI effectively in her infancy.
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Does Cortana have the logic plague?

We, the audience, already know that the logic plague (or something similar) is the only thing that explains Halo 5's Cortana. We thus also already know that Cortana 2, who does not have the logic plague, will not repeat Cortana 1's mistakes.
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Why did Master Chief go AWOL?

Master Chief Goes AWOL

After learning that Cortana is alive following the events of Halo 4, Master Chief leaves the UNSC (along with three members of his longtime canonical Spartan crew, Blue Team) in order to track her down and rescue her.
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Is Cortana a Weapon?

"The Weapon" (AI Serial Number: CTN 0453-0) is the moniker of an artificial intelligence. She was created as an exact copy of the AI Cortana, designed to enter an installation to imitate Cortana and lock her down for retrieval.
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Who is the strongest Spartan in Halo?

Halo: Ranking The 12 Strongest Spartans (That Aren't Master Chief...
  • 8 Buck.
  • 7 Jerome-092.
  • 6 Kelly-087.
  • 5 Kurt-051.
  • 4 Frederic-104.
  • 3 Spartan-B312 (Noble 6)
  • 2 Linda-058.
  • 1 Samuel-034.
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Is Noble 6 related to Master Chief?

Noble Six is Master Chief's son and has a brother called The Rookie.
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Is Noble 6 stronger than Master Chief?

Noble Six, however, slightly edges out Master Chief regarding this one. In the dying hours of Halo: Reach, Noble Six fends against hordes of Covenant forces while gravely injured. He never gave up, even when defeat and death were guaranteed.
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Who betrays Master Chief?

Though it is possible that the Chief and 343 Guilty Spark can be looked at as betraying each other, or that it is referring first to Cortana 'betraying' the Chief by refusing to activate Halo, then to Guilty Spark. This is the last level in which the player fights Jackals in Halo: Combat Evolved.
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Is Cortana named after Halo?

The article is a good reminder of the fun origin story behind the assistant being branded as “Cortana” — the name was taken from the Halo character (who is also an AI, which isn't confusing at all) and was only supposed to be used during development.
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How did Cortana lose her guardians?

Throughout the major areas of the galaxy where Cortana knew advanced life thrived, she sent the Guardians to these planets and deactivated most technologies with attenuation pulses. Fortunately for humanity, the UNSC Infinity managed to escape Cortana's Guardians and was forced to go into hiding.
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What is the AI name in Halo Infinite?

So yes, The Weapon's name is also Cortana. For the sake of distinguishing who's who, we guess people will eventually call her somewhat in the likes of Cortana 2.0 or NeoCortana. At least now we know that if ever the Master Chief goes into his missions in the future, he won't be without a companion AI.
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Will Cortana be in infinite?

Halo Infinite does feature Cortana, but not necessarily as a lot of fans expected her to be featured. Following her mutiny in Halo 5: Guardians, she left Master Chief's side, so to replace her, Chief gets a new AI named Weapon.
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Who deleted Cortana?

During this period Atriox, the leader of The Banished and a large army of his boys manages to confront Cortana on Zeta Halo at the same time Master Chief appears with the UNSC and an AI known as The Weapon with the plan of containing Cortana and deleting her.
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