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Cortana

 
"Don't make a girl a promise... If you know you can't keep it."
—Cortana to John-117.

Cortana, UNSC AI serial number CTN 0452-9, is an Artificial Intelligence construct. She is a "smart" A.I. (meaning she could perform varying missions and options and can learn new material without having to free up space in her memory), capable of performing processes at blinding speeds. She can calculate up to one trillion computations, as well as possessing a personality similar to that of a human. She was one of the most important figures in the Human-Covenant War, and served as John-117's partner in various combat missions, as well as serving as the AI for the United Nations Space Command Halcyon-class Cruiser Pillar of Autumn and the Orbital Defense Platform Cairo Station. In addition, she held vital data pertaining to the Halos, such as the Index from Alpha Halo.

 

Contents

  • 1 Biography
    • 1.1 Creation
    • 1.2 Fateful Meeting
    • 1.3 Discovery
    • 1.4 Dust and Echoes
    • 1.5 First Battle of Earth
    • 1.6 Delta Halo
    • 1.7 Captured
  • 2 End of Halo 3
  • 3 Personality
    • 3.1 Appearance
    • 3.2 Abilities

 

 

 

 

 Biography

 

 

 

Creation

Cortana was created using a flash cloned brain of the famous Dr. Catherine Elizabeth Halsey, the SPARTAN project creator. Twenty of the flash cloned brains were created, but only one survived, which was used to create Cortana. She is one of the two AI to be created from Dr. Halsey's brain, the other being her predecessor, Kalmiya (also a smart AI). Cortana seems to share her creator's memories, thoughts, and even values. For example, when she was asked by Dr. Catherine Halsey to pick a "carrier", Cortana chose John-117 for their neural compatibility, with Dr. Halsey agreeing (and it is mentioned that Cortana quoted "You had something that no one else had...luck"). Being a smart A.I., however, her operational life span is approximately seven years. She is not only a facsimile of Dr. Halsey's brain but also closely resembles her physical form, at a younger age.

 

Image:Cortana-H3.png

Fateful Meeting

Cortana first met the Master Chief prior to the Battle of Reach, where she was integrated into his new Mark V MJOLNIR armor. Together, Cortana and the Chief passed a test that was devised by Colonel James Ackerson. The test included armed ODSTs, mines, automatic turrets in the razor field, and even a SkyHawk air strike at the Pillars of Loki. After the test, Cortana was installed into the Pillar of Autumn for the mission she was created for. While she acted as the AI for the Battle of Reach and the beginning of the Battle of Installation 04, that wasn't her job. She was running the ship's shakedown cruise due to Doctor Halsey's modifications and once that was over, she was going

 
Cortana
Biographical information
Began service

Before 2550

Physical description
Gender

Female AI programming

Description

Tall and slender with short-cut hair in Halo: Combat Evolved, then long hair in Halo 2 and Halo 3

Normal color
  • Normal: Blue/Purple, Green while inside Alpha Halo's central computer
  • Angry: Pink/Green[1]
  • Flattered: Pink]]
Political information and functions
Affiliation

United Nations Space Command

Primary function

Software Infiltration, Capture of a Covenant Prophet, Assisting the Spartans

Notable battles
  • Battle of Reach
  • Battle of Installation 04
  • Second Battle of Reach
  • Battle of Eridanus Secundus
  • Battle of Installation 05
  • First Battle of Earth
  • Destruction of Installation 04 (II)
 

to be replaced by the Pillar of Autumns AI but circumstances dictated her continuing to act as the ship's AI.

Cortana's primary mission was to aid the Spartans in the infiltration of a Covenant vessel and the capturing of a Covenant Prophet. The UNSC would then try to bargain with the Covenant for a peace treaty. She had a chance to pick which Spartan she would partner up with and assist. The Spartan she picked was John-117 because of his "luck".[2] It should also be noted that she could have picked John-117 because Dr. Catherine Halsey had always favored John. [3] In fact, since Cortana thought John was "handsome in a primitive, animal sort of way", it is probably what Halsey reflected, as Cortana was simply Halsey's clone. This is also because Dr Halsey had felt a little awkward when Cortana had directly stated it, when she herself kept it as a thought.

 

 Discovery

When the operation was canceled due to the Covenant's surprise assault on Reach, she and her new partner, John-117, witnessed the death of all the Spartans except Linda (Note: at the time the Master Chief thought Linda was dead) and were left to flee the burning planet to a randomized set of coordinates per the Cole Protocol. However, Cortana secretly inserted coordinates translated from symbols on a rock that Master Chief discovered on Sigma Octanus IV and the Covenant ship John-117 had boarded in 2525, thinking that they were of some significance to the Covenant. After emerging out of Slipspace, they discovered a ring shaped world that was promptly named "Halo". However, Covenant ships had followed, and began an assault. Controlling the Pillar of Autumn's defenses, Cortana destroyed four Covenant targets over Installation 04 before the ship's weapons were disabled by Covenant boarders. Per the Cole Protocol, Captain Jacob Keyes, the ship's commanding officer, prepared to abandon ship. Since the protocol forbids the capture or destruction of any A.I. construct, the Master Chief was charged with protecting Cortana from the Covenant. When the Master Chief arrived on Halo, Cortana helms the communications channels and helped to direct Foehammer, a dropship pilot, to human survivors scattered across the ring and assisted the Master Chief in the rescue of Captain Keyes, who had been captured by Covenant forces and was taken to the cruiser Truth and Reconciliation.

The Master Chief and Cortana then located Halo's Control Room by using the Silent Cartographer. Upon arriving at Halo's Control Room, Cortana was inserted into Halo's core computer and looked for a way to activate Halo to use it as a weapon against the Covenant, but became visibly agitated and sent the Master Chief to find Captain Keyes. Cortana stayed in Halo's computer core as the Master Chief encountered the parasitic Flood and was conscripted by a Forerunner construct named 343 Guilty Spark to activate Halo's defenses.

343 Guilty Spark then teleported the Master Chief to the Library, where he battled more of the Flood with help from 343 Guilty Spark's Sentinels. They then retrieved the Activation Index, the key to activating Halo, and returned to the Control Room. Intent on using the Index, the key to Halo, to eliminate the Flood, the Master Chief inserted the Index into the control panel where Cortana who revealed the truth that she stopped him had learned: The Halos do not kill Flood, but their food. If Halo was activated, all sentient life (a.k.a. anything that could think) in the galaxy would be annihilated. She took the Index and thus became a target for 343 Guilty Spark. Having captured the Index, Cortana and the Master Chief planned to destroy Halo. They succeeded after Cortana helped the Chief detonate the Pillar of Autumn's fusion reactors, causing an explosion powerful enough to destabilize the ringworld. The two escaped in a Longsword Fighter and witnessed the ring's destruction.

 

 Dust and Echoes

After the destruction of Halo, Cortana and the Master Chief, seemingly the sole survivors of the tragic events on the ringworld, discovered a small number of other UNSC personnel that had escaped the ring in a Pelican dropship. In order to perform any space travel, the Master Chief, along with Cortana and the four man crew of the Pelican, fought their way onto a Covenant flagship Ascendant Justice. Shortly afterward Cortana took control of the ship, and returned the survivors to Reach and fought the Second Battle of Reach, rescuing survivors from the glassing of the planet. Ascendant Justice was effectively fused with the UNSC Gettysburg, and she later returned to Earth with the remaining survivors after destroying the Covenant space station Unyielding Hierophant that threatened Earth. (This is also the first time Cortana encountered the Brute species.) Previously, Cortana had captured a Covenant Associated Intelligence present in the Ascendant Justice's computer; it contained a software-replication program. In this instance, Cortana gained the ability to create imperfect clones of her program. The Master Chief and Spartan Blue Team brought one of these clones to Unyielding Hierophant. This clone then re-cloned itself hundreds of times, making matters a little difficult. However, the clone managed to secure Blue Team a safe way out of the space station before it was locked down. It was during this mission that Cortana figured out that Covenant ships could enter Slipspace from within the atmosphere of a planet. This data was stolen by a Covenant A.I. and broadcast to another Covenant ship. This is why the Prophet of Regret was able to enter Slipspace right above New Mombasa during the First Battle of Earth. Also Cortana was revealed to have taken a lot of data from Halo and the sheer amount cut into her processing power and slowed her down somewhat. The reason that they ended up having to use a clone of her was all of the data she collected on Halo, the Flood and Covenant technology made her too valuable to risk as all of the information she'd learned was vital and needed to get back to Earth and there was nowhere safe enough for her to store it. Presumably once they reached Earth she turned all of the data over to ONI.

 

First Battle of Earth

Returning to Earth, Cortana served on the Earth defense platform Cairo during the awards ceremony for the survivors of the first Halo installation. When a Covenant Fleet under the command of the High Prophet of Regret arrived, Cortana took control of the Cairo's Magnetic Accelerator Cannon (or MAC gun) to repel the invaders, and with the Master Chief's help successfully deactivated a bomb that would have destroyed the station. The same bomb was then used by Spartan-117 to destroy a Covenant Assault Carrier. The Chief offered for her to remain behind on the station after she said that his plan was crazy, but she chose to remain with him and help him again stating "unfortunately for us both, I like crazy." She then aided him when he arrived in New Mombasa to deal with a Scarab.

 

Delta Halo

Later, after escaping on-board the In Amber Clad in a slipspace event, they discovered another ringworld, Delta Halo. Cortana gave Commander Miranda Keyes access to all information on the original Halo Ring, and provided intelligence to the Chief, UNSC Marines and the ODSTs on the surface of the ring.

After the Master Chief hunted down and killed the Prophet of Regret on Delta Halo, he along with Cortana were captured by the Flood leader, the Gravemind. However, the Gravemind did not harm them, instead it wanted the Master Chief and Cortana to stop the Prophet of Truth from firing the ring. The Gravemind sent the Master Chief and Cortana to the Covenant Holy City of High Charity, Cortana infiltrated the city's computer systems and remained there while the Master Chief followed the Prophet of Truth. She promised to detonate the crashed In Amber Clad's reactors to destroy the city and Halo if the ring was activated. However, she was left behind as a fail safe because she did not want to chance a remote detonation. As Truth boarded the Forerunner Dreadnought in the heart of the city to reach the Ark, Cortana fought with the ancient Forerunner A.I. Mendicant Bias to prevent the ship from launching without the Chief on board. The firing of Halo was averted by Miranda Keyes, the Arbiter Thel 'Vadamee, and Sergeant Major Avery Johnson, while the Chief successfully boarded the Dreadnought and escaped High Charity, leaving Cortana in the clutches of the ally turned enemy, the Gravemind, who had, by then, overrun High Charity, by choice.

 

Captured

"Chief...High Charity...the Covenant's Holy City...is on it's way to Earth...with an army of Flood."
—Cortana's recording for the Chief

Cortana managed to send a message to the Master Chief on Earth, through a Flood-infected ship. In her message, she stated that the Gravemind was approaching Earth in High Charity but was unaware of the Portal opened by a Forerunner artifact on Earth. Cortana continued to appear to the Master Chief, who successfully recovered her from the Flood Hive that was High Charity. Along the way, the Master Chief had several visions of her seemingly in pain, although it is actually the Gravemind projecting memories of Dr Halsey. Surprised that the Chief had against all odds rescued her (as he promised after the First Battle of High Charity), Cortana managed to gather herself and produce the Index from Installation 04, which she had kept as a souvenir. With it, Cortana was able to activate the newly constructed ringworld. The new Installation 04, was fired prematurely and destroyed itself, and The Ark along with it .

"But you did it. Truth and the Covenant...the Flood. It's finished."
—Cortana

 

End of Halo 3

While the Flood were destroyed as planned, the Slipspace portal collapsed as the Master Chief, Thel 'Vadam, and Cortana attempted to escape through it, cutting the UNSC Forward Unto Dawn in half. While 'Vadam, who was on the bridge, escaped to Earth through the portal, the Chief and Cortana, who were in the hangar, were left drifting in space. Cortana activated a distress beacon, but knew that it could be days, years even, before they were found. As the Master Chief prepared to go into a cryogenic sleep to await rescue, Cortana confided to him that she would miss him. He replied to wake him when she needed him.

"I'll miss you."
—Cortana, last words to Master Chief

 

Personality

Cortana in the Halo 3 instruction manual.
Cortana in the Halo 3 instruction manual.

Cortana has a witty personality and a small sense of humor laced with some sarcasm. She has neither arrogance nor false modesty about her immense capabilities, and her statements about her abilities have an objective perspective that human beings typically cannot achieve, but she does get bored often and easily. In fact it is said that seven seconds of inactivity for an A.I. is excruciating. She has genuine, not merely programmed, loyalty to humanity and the UNSC, but exhibits devotion to John-117 beyond that which her programming or mission requires. She seems to be most loyal to him and is willing to help him with any task he requests of her. After she found out exactly what happened to the Master Chief as a child, she decided to protect him from further harm to the best of her abilities without compromising her mission.

Her personal loyalty is regarded as unwavering, but as an AI construct she is subject to corruption. Lord Hood questioned her reliability when it became clear that she had been compromised in some way by the Gravemind's possession of High Charity, on which she was trapped. John-117, however, never questioned her integrity. Cortana did consent to answer some of the Flood's questions, as a strategy for survival and the possibility of gaining information for the UNSC. Her sanity is pushed to the brink as she eludes the Gravemind's attempts to capture and dissect her for information. Before she reunites with John-117 in Halo 3, she sends him a message, telling him about The Ark and warning him of Flood-infested High Charity's approach to Earth. She is furthermore instrumental in finally putting a stop to the Flood at the end of the game.

Main Article: Cortana Moment

Cortana is also very aware of her short lifespan (AI lifespan is an average of 7 years) before rampancy) and her derivative nature as a copy of part of another person, rather than a true human being. Desperate and tortured aboard High Charity she murmurs: "A collection of lies; that's all I am! Stolen thoughts and memories!" Later on she says: "I'm just my mother's shadow..." and "It was the coin's fault," referring to the game of chance that Dr. Halsey played with the young John.

She frequently jokes about having a relationship with the Master Chief and it is often implied that the two characters have developed some form of attachment. In Halo: The Fall of Reach, she says to Dr. Halsey that the Master Chief is "attractive in a primitive animal sort of way" while examining a photo of him.

 

Appearance

As Cortana is an AI, she has no physical body. She can communicate through comm systems and project a holographic image of herself from appropriate projectors, such as Holotanks. Her chosen avatar appears to be nude (albeit slightly censored by symbols over her body), about in her early twenties, female human with purplish/bluish skin, shoulder length purplish/bluish hair cut shorter at the back, and blue to symbols scrolling down her body. In cases of being in a different emotional state, Cortana usually changes colors. This was especially noticeable in Halo: Combat Evolved, but less so in Halo 2 and Halo 3. Only in specific instances did she produce the color changing effect. One instance of a Cortana moment occurred right before the Master Chief rescued her at the end of her eponymous level. In Halo: Fall of Reach, Cortana is said to resemble her creator, Dr. Catherine Halsey as a young woman, with a similar attitude "only unchecked by military and social protocol."

Bungie took a fair of amount of artistic freedom in the evolution of her appearance throughout the Halo trilogy, noticeably from Halo: Combat Evolved to Halo 2; she has longer hair, a more realistic figure, making her more human, a much more feminine figure and a slightly different shade of purple. In Halo 3, she becomes slightly bluer and again her face, hair, and body become more womanly and realistic.

 

Abilities

Cortana was designed to infiltrate computer systems and she is excellent at the task. She has become so intelligent that she understands Covenant technology far more than its makers. So far, she has not encountered a security program she was not able to defeat, as she says in Halo 2 while inside High Charity's computer system, "You wouldn't believe the number of kill systems the Covenant are throwing down around me. It's pretty sloppy stuff, though. I guess they never expected a hostile intelligence to penetrate their system from the inside.". In addition, she is proficient with UNSC military hardware and can run military ships and stations by herself. Indeed, the UNSC's primary use of AIs is to oversee targeting of point-defense weaponry used in space battles. For Cortana, this is merely an additional capability. She has helped out in several major battles including Operation: First Strike. She is capable of storing such large amounts of data with the many lines of code streaming through her holographic form. Even when she is in the Data Crystal Chip microscopic lines of code are running through the holographic "filling".

Cortana can be transferred among various computer systems. In Halo: Combat Evolved she needed a Data Crystal Chip to move in and out of various networks, including the Master Chief's MJOLNIR armor.[4] In Halo 2, she merely needs to be touching another system to access it; however, this is most likely a product of the Master Chief's upgraded armor. Quite strangely, in Halo 3, she reverted to the data chip, this was probably because the Master Chief's armor was badly damaged during the fall to Earth and reverted to a back up system; this is also why the shield is different. However, there are some differences. Instead of having to be physically "plugged in" to the hologram projector, the Chief just holds the chip close to it and she "walks" off and she "touches" the chip to return, holographic representations of the data transfer.

She is also very good at planning missions for the Chief such as the destruction of Halo. In Halo: The Flood the Chief comments that he's not sure who's better at blowing things up: him or her. It was also her plan that led to the destruction of all of the Flood that had escaped Installation 05 and saved the galaxy from a further Flood invasion. Apparently she has mission planning routines that help her with this as her clone told the Chief that that copy had only limited mission planning routines and was only able to help the Spartans form basic plans.

Another ability that she developed is a limited teleportation ability on Installation 04. She learned how to teleport on Halo while in its control systems, but as she couldn't access Halo's power grid, she couldn't perform this task much. She did teleport once with the Master Chief by drawing power from his fusion pack saying that she was sure it wouldn't cause permanent damage to his power pack or shields, but both agreed that this should only be done once. She learned where they needed to go from the Covenant Battlenet and teleported them there although they ended up upside down due to her not getting the coordinates completely right. She has not used this ability since although she could presumably use it on any Halo but would have the same power requirements problem.

Another of her abilities is the ability to clone herself. She got this from a Covenant AI she destroyed and dissected. She first tested it by copying her language translation abilities and found it worked great. She also could seem to sense what progress the clone had made as if she retained a connection to it. Later, due to the importance of her getting to Earth due to all of the data she'd collected on Halo, the Flood and Covenant technology, she was forbidden from going on the Master Chief's mission, but she was able to make a clone of her infiltration abilities to give the Chief enough of her capabilities to infiltrate the Covenant command and control station. She claimed that this would not be a complete copy, but she thought that what it was would be enough. The clone had at least some of her personality as well. The clone retained her abilities to hack systems and some limited mission planning routines that allowed her to make basic plans to help the Spartans, but was unable to make the complicated plans that Cortana could come up with. The original clone made a copy of itself into the station's systems to help out and due to being overwhelmed by Covenant security AI's, ended up making hundreds of copies of itself which overwhelmed the system and made accomplishing anything hard for the clones as they began to lose their coherent state, but still could control the system. The original clone was left behind in the reactor system. It was placed there to overload the reactors and never removed once it started the process. All of the clones created on the mission were destroyed when the station blew, but provided an invaluable help to the Spartan team. Cortana has apparently not used this ability since.

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