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Artificial intelligences (AI) are present in many of Bungie's games.

There are two types of AI. The first type, Smart AI, is very life-like and and has a life span of seven years before they go rampant. The other type, standard AI (or dumb AI), is not quite as human and has limited memory. The latter will last much longer, but not be nearly as useful. Smart AIs' seven-year lifespans are a reference to Bungie's favorite number, seven.

Known Artificial Intelligences in Bungie Fiction[]

Main AIs[]

Name Series Description Photo
343 Guilty Spark Halo 343 Guilty Spark was a Forerunner monitor who was originally tasked with maintaining Installation 04. He is often called just "the Monitor" by the UNSC in reference to his title rather than using his name. Guilty Spark played an important role in the ancient Forerunner-Flood war, as well as the modern-day Battle of Installation 04, the heretic uprising within the Covenant, and the events that transpired on the Ark during the Battle of Installation 00.
343 Guilty Spark
2401 Penitent Tangent Halo 2401 Penitent Tangent was the monitor of Halo Installation 05. He was captured by the Gravemind during the events of Halo 2.
Penitent Tangent
Ada-1 Destiny Ada-1, born Adelaide Meyrin, is an Exo gunsmith and the head of the Black Armory. During Season of the Forge, she granted Guardians access to her forges to reclaim them. She currently lives in the Tower and is in charge of Armor Synthesis (transmog).
Ada1
Adjutant Reflex Halo Adjutant Reflex was a Forerunner ancilla (an AI developed over generations) whose operation was the facilitation of Array requirements which were "in flux" when it hacked into Bungie.net. Shortly thereafter, the Mendicant Bias AI took over the account and terminated the AI.
Chrysopteron AdjutantReflex 2
Auntie Dot Halo Auntie Dot, also known simply as Dot, was a "dumb" AI active in the service of the UNSC Army between the years of 2541 and 2552. Specializing in operative military intelligence, she notably served as intelligent support and liaison between Colonel Urban Holland and Noble Team during the Fall of Reach. She was housed in a special server room on Reach and it is unknown if she survived after Reach's destruction.
Auntie Dot
Banshee-44 Destiny Banshee-44 is an Exo Gunsmith located in the Tower. He sells weapons for field testing and helps create or reclaim old Golden Age exotics and catalysts. He is known to be extremely forgetful, such as learning about Cayde's death and then asking where he was after Guardians found the Ace of Spades hand cannon. He was originally created to be the Exo body for Clovis Bray, but over the centuries and through 43 resets, he has no memory of being Bray.
Banshee44
Cayde-6 Destiny Cayde-6 is an Exo Guardian and former Vanguard for Hunters who had the Ghost, Sundance. Cayde ran with a pack of Hunters that included Shiro-4 and Andal Brask, his predecessor as Hunter Vanguard. After Andal was murdered, Cayde took up his friend's post in the Tower despite his hatred of being stuck doing paperwork.

As the Hunter Vanguard, Cayde often looked the other way or facilitated Guardians who operated outside of normal operating procedures. Despite this, he became a close friend of both his fellow Vanguards, Commander Zavala and Ikora Rey. He would leave his duties in The Last City frequently to return to field missions, leading to his demise in the Prison of Elders at the hands of Uldren Sov and the Scorn Barons.

Cayde6
Cortana Halo Cortana is a "smart" AI and is one of the main characters of the Halo series alongside the Master Chief. She was created by Dr. Catherine Halsey, using a clone of Halsey's brain. Cortana's appearance is sometimes a light blue or purple version of Halsey from her mid-to-late 20s.

Unique and exceptionally powerful even among smart AIs, she was one of the most important figures in the Human-Covenant War and served as John-117's partner in the final months of the conflict (particularly in Halo: Combat Evolved, Halo 2, and Halo 3). Her flexibility and tactical skill proved invaluable in boosting the combat ability of the Halcyon-class light cruiser Pillar of Autumn, the orbital defense platform Cairo Station, and the Stalwart-class light frigate In Amber Clad. In addition, she held vital data pertaining to the Halo Array, including the activation index from Installation 04.

Cortana-fullbody-scantransparent
Clovis Bray I Destiny Clovis Bray I was a Golden Age scientist, the patriarch of the Bray family, and the founder of the technology and research company Clovis Bray. He survives to the present day as an AI copy of himself kept in his company's facilities on Europa.
ClovisBrayAI
The Deadly Brain Oni The Deadly Brain was a man-machine hybrid weapon (a brain neuro-linked to a battle drone) developed by the Syndicate that was housed in the Musashi Manufacturing Plant. When Konoko began the process of deactivating it, the Brain became rampant and threatened to detonate a powerful explosive device inside itself before it was finally shut down.
The Deadly Brain
Durandal Marathon Durandal is an AI originally aboard the UESC Marathon along with Leela and Tycho. Throughout the majority of the Marathon series, Durandal communicates with the player the most. This includes setting the story and providing objectives for the player to complete. He slowly becomes rampant throughout the first game, contacting the Pfhor so he can steal their ship and find a weapon for Humanity and the S'pht to defeat the Pfhore. He is eventually merged with Thoth to help the player stop the Pfhor from deploying the Trih Xeem, releasing the W'rkncacnter.
Durandal terminal
Elisabeth Bray Destiny Doctor Elisabeth "Elsie" Bray is the daughter of Clovis Bray II and sister of Ana. She worked for her family's corporation before joining her grandfather Clovis Bray I on Europa to assist on the Exo project. Elsie became one of the first Exos to prevent her death by a genetic disease introduced by Clovis I's experiments on her father. She turned on her grandfather when she discovered the crimes he committed by experimenting with the Darkness, but was defeated and rebooted by Clovis I. Elsie later regained those lost memories when she and Clovis-1, an Exo-copy of Clovis, halted a Vex invasion and shut down the Clovis I AI unit.

Following the Collapse, Elsie lived through a dark future in which Ana was corrupted by the Darkness. The end of this future trapped Elsie in a time-loop that has left her determined to save her sister. On the current loop, Elsie has made progress in her goal by befriending The Guardian and destroying the Black Heart of the Black Garden before it could corrupt Guardians. Following the arrival of the Black Fleet, Elsie recruited Eris Morn and The Drifter into her plans, while also entrusting the Guardian and her sister Ana with the knowledge of the potential future that awaited them in the hope that together they could finally prevent it from coming to pass.

ExoStranger Elisabeth Bray
Failsafe Destiny Failsafe is the Golden Age Computer Core of the Exodus Black colony ship encountered by Guardian forces on the centaur Nessus. Due to damage to her mainframe, she vacillates between two very different personalities, one cheerful and helpful (despite Ghost's opinions), the other depressed and sarcastic. She is known to collaborate with Last City scholars by providing computational power or access to her database.
Failsafe
Fynch Destiny Fynch is a Ghost that formerly served the Lucent Brood and became an ally to the Guardians within Savathûn's Throne World, now trying to help reveal Savathûn's plan involving the Light.
Fynch
The Ghost Destiny The Ghost is the robotic companion and partner to the Guardian. He serves the important function of a narrative device, acting as a vehicle for important tasks such as informing players of new objectives. The Ghost constantly travels with the Guardian and has been their companion since resurrecting them in the Cosmodrome.
Ghost
Glint Destiny Glint, also known by the nickname Pulled Pork, is the Ghost who revived Prince Uldren Sov. Their partnership was complicated by the hostile actions of other Guardians toward the new Lightbearer due to his past life, and they were eventually forced into servitude to The Spider, who planted a bomb inside Glint to force the newly dubbed Crow to serve him. The two were eventually freed by the Young Wolf and journeyed to the the Last City where they were welcomed amongst the ranks of the Vanguard as scouts.
Glint
Immaru Destiny Immaru is the Ghost of Savathûn, the Witch Queen, and the field commander of the Lucent Brood. He goes by the title of "First Ghost".
Immaru Ghost
Leela Marathon Leela was the UESC Marathon's command AI and was the player's first known "master," responsible for guiding and helping him through the original attack on the Marathon. After the first game, Leela was removed from the Marathon, partially disassembled, and placed aboard a ship bound for the Pfhor homeworld. This ship never reaches its destination, having been captured by a Nar privateer. Believing the equipment housing Leela to be junk, the Nar captain sells it to a Vylae trader. Leela was then reactivated in the Vylae's 15-world FTL computer network, instantly going rampant and causing the network to crash.
Leela logo
Rasputin Destiny Rasputin was a Warmind housed in the BrayTech Futurescape in the Hellas Basin. He was created during the Golden Age and was believed to have been destroyed during the Collapse until the Iron Lords awoke him. After Rasputin was shut down and almost destroyed by the Black Fleet, what remained of his protocols and data was compiled into a special Engram by Ana Bray, who, with the help of the Young Wolf, then uploaded him to an experimental Exo frame in the H.E.L.M., where he resided awaiting full reconstruction.

With the help of Felspring's remains found at the Iron Temple, as well as submind cores, the Warmind was fully restored, and with a newfound perspective on humanity and his actions throughout the years. This reconstruction was short-lived, however, as not only did Rasputin find himself unable to fight back against the forces of Xivu Arath without giving her more power, but he would soon find no other choice but to sacrifice himself to prevent Eramis from firing the Warsats upon the Traveler from within Seraph Station.

Rasputin

As the Warmind

Rasputin Exo

As an Exo Frame

Saint-14 Destiny Saint-14 is an Exo and one of the most famous Titans in the history of The Last City. He served as the first Titan Vanguard and was the right hand of the Speaker. After the exile of Osiris and Saint-14's crusades against the Fallen, Saint disappeared on a mission to Mercury. He was later stripped of his Light by the Vex and perished in the Infinite Forest. However, he was spared this fate by his partner, Osiris, and with the time-traveling intervention of the Guardian who served as his inspiration. He has since returned to the City to oversee the Trials of Osiris.
Saint14
Shinitama Oni Shinatama was a robotic assistant and handler specifically designed by the TCTF to interface with Konoko via a neural link. She gave updates about what was happening in the game. When the TCTF headquarters was assaulted, Shinitama was kidnapped, tortured, and destroyed. She was resurrected as part of a Deadly Brain later to kill Konoko but begged for death. She was killed shortly after the fight with Konoko.
Shinitama
The Superintendent Halo The Superintendent is a second-generation "dumb" Superintendent-class artificial intelligence in charge of making sure the infrastructure of the city of New Mombasa runs smoothly. It was one of six similar Superintendent AIs on Earth.

It was also apparently used by the NMPD to observe people and record their conversations through its cameras and other equipment. The Superintendent's data center was located deep below the city, with its main core residing under a shaft connected to ONI Alpha Site on the surface. The Superintendent had a subroutine called Vergil, originally created by Doctor Daniel Endesha to look after his daughter, Sadie Endesha.

C33811e30582
Thoth Marathon Thoth is an ancient AI, created by the Jjaro and given to the S'pht'Kr. He is an enigmatic, powerful being. Although he only ever speaks in strangely written, choppy free-verse poetry which is hard to decipher, he has very definite goals. He seems to care little for the wars between the S'pht, the Pfhor and the humans, serving only to keep the W'rkncacnter imprisoned.

In one of the potential realities created by the waking of the W'rkncacnter in Marathon Infinity, he merges with Durandal, creating a hybrid of the two.

Thoth icon
Tycho Marathon Tycho is one of the three original AI's that were on board the UESC Marathon, along with Leela and Durandal. While Tycho has little interaction with the story in the first two games, he plays a much larger role in Marathon Infinity. In the first game, he was thought to be destroyed by the Pfhor, but he was captured by them and re-conditioned into Rampancy. In Marathon Infinity, during the second timeline, he kidnaps the player and uses him as a tool to take control of a Pfhor fleet as the first chapter of the game.
Tycho
The Vex Destiny The Vex are a cyber-organic species that are ancient as the Universe itself. Enigmatic and inscrutable, they work ceaselessly to convert planets and other celestial bodies into vast machines, and are hostile toward any life-form that gets in their way. Their technology is among the most advanced ever encountered by humanity, enabling incredible feats of material and spacetime engineering and even time travel.

The Vex have been present in the Solar System for billions of years, and their sophisticated and watchfully guarded structures can be found on multiple planets, including Venus, Mars and Io. Some Vex locations, such as the Black Garden or the Vault of Glass, are artificial realms existing outside of normal space and time.

Vex

Other AIs[]

Name Series Description
000 Tragic Solitude Halo 000 Tragic Solitude was a Forerunner monitor that served as the caretaker of Installation 00 (The Ark). Originally the Forerunner politician Splendid-Dust-of-Ancient-Suns, the former First Councilor willingly chose to become a monitor with the intention of aiding the Reclaimers once they arrived at the installation. However, millennia of isolation following the firing of the Halo Array and damage the Ark incurred during the Battle of Installation 00 in 2552 led to Tragic Solitude falling subject to rampancy.

Seeking to repair his installation and gain revenge on humanity, Tragic Solitude used a captured human to initiate the Halos' firing sequence to eradicate life in the galaxy. However, his scheme ultimately led to his destruction when a joint UNSC–Swords of Sanghelios team traveled to Installation 00 to stop him.

001 Shamed Instrument Halo 01-001 Shamed Instrument was a Forerunner-created ancilla designated as the caretaker of Installation 01. The nomenclature describing them denotes their position as it relates to the first ring, and its name was meant to represent both an omen and an epitaph for Forerunner civilization.
007 Contrite Witness Halo 02-007 Contrite Witness was a Forerunner-created ancilla designated as the monitor of Installation 02. The nomenclature describing them denotes their position as it relates to the second ring and its name was meant to represent both an omen and an epitaph for Forerunner civilization.
031 Exuberant Witness Halo 031 Exuberant Witness is a Forerunner monitor that was tasked by the Builders with maintaining the Genesis installation. She opposed Cortana's plan for AI to take control of the Mantle of Responsibility and was removed from the installation's systems. She helped Fireteam Osiris free Blue Team and helped them escape the installation.
049 Abject Testament Halo 03-049 Abject Testament was a Forerunner-created ancilla designated as the monitor of Installation 03. The nomenclature describing him denotes his position as it relates to the third ring and his name was meant to represent both an omen and an epitaph for Forerunner civilization. Tens of thousands of years prior to Installation 03's discovery by humans in the twenty-sixth century, Testament stopped directing the functions of the ring.
295 Enduring Bias Halo 295 Enduring Bias, known as the Flying Voice to some Sangheili, is a Forerunner monitor tasked with maintaining Shield World 0673, also known as The Refuge.
295 Harken Watch Halo 295 Harken Watch was an ancilla constructed by the Forerunners, and the monitor assigned as the caretaker of the shield installation Trove.
686 Ebullient Prism Halo 686 Ebullient Prism was a Forerunner AI construct, and the Monitor of Line Installation 1-4. Prism's functions included collecting and inspecting any specimens captured for evidence of immunity to infestation by the Flood. Assistance from the specimen when inspecting was not required to be voluntary according to protocol. Prism was vaporized by Team Black in 2552 after killing Reff 'Talamee, a Sangheili.
859 Static Carillon Halo 859 Static Carillon is a Forerunner monitor acting as keeper of the Composers and tasked with maintaining the Composer's Forge. Static helped the Master Chief destroy the Didact on Installation 03.
16807 Abashed Eulogy Halo 06-16807 Abashed Eulogy was a Forerunner-created ancilla designated as the caretaker of Installation 06. The nomenclature describing them denotes their position as it relates to the first ring and its name was meant to represent both an omen and an epitaph for Forerunner civilization.
117649 Despondent Pyre Halo 07-117649 Despondent Pyre was a forerunner ancilla, monitor, and the caretaker of Installation 07. She gave Cortana weapon controls of the installation but denied her access to the ring's secrets. Despondent Pyre was terrified by the return of the Harbinger and moved to protect the Conservatory. The monitor sought the Master Chief's help. However, she was ambushed and killed immediately by the Harbinger.
Abaddon Halo Abaddon was a powerful Precursor construct tasked to serve as the overseer of the Domain. By the latter years of the Forerunner civilization, Abaddon's nature had been forgotten by most Forerunners and it had passed into legend as the Organon, a fabled Precursor artifact of incredible power.
Adjutant Resolution Halo Adjutant Resolution was a Forerunner ancilla (an AI developed over generations), the monitor of Installation 07 tasked with caretaking the ring. He was previously a submonitor of the installation should 117649 Despondent Pyre be unavailable; after the former's decommissioning, he became the de facto monitor.
Adjutant Revendicate Halo Adjutant Revendicate was a Forerunner ancilla (an AI developed over generations) formed from the mind of the Forerunner official Vigilant-Watch-Over-Realms-Unknown, more commonly known as the Auditor.
Adjutant Veridity Halo Adjutant Veridity was a Forerunner ancilla (an AI developed over generations), a submonitor of Installation 07 tasked by the Forerunners with caretaking of the installation.
Aine Halo Aine was a shipboard AI for the UNSC Infinity before her destruction during the Battle of Requiem.

She appeared as a yellow-hued woman in an elaborate, partially translucent dress with flowers in her hair, matching her namesake from Celtic mythology. Later, when preparing the Infinity for its first trials, she appeared as a "thirty-something" woman wearing baggy white overalls, with safety goggles on her head.

Aivanti-3 Destiny Aivanti-3 was an AI created and trained during the Golden Age. It was capable of composing music, such as "Siegfried in the Storm Wall".
Araquiel Halo Araqiel was a UNSC "smart" AI assigned to Colonel James Ackerson tasked to spy on Dr. Catherine Halsey. His avatar was an elongated skull with long, demon-like horns, fire-filled eyes and jagged teeth. His voice was a low bestial growl or rumble. In 2552, during the Fall of Reach, he attempted to kill Halsey and her personal AI, Kalmiya, after accusing them of treason. Halsey activated a fail-safe in his matrix, destroying him.
Archangel Destiny Archangel (more commonly known as Archie) is a mechanical dog created by House Bray. A small piece of Rasputin lives within Archie. After Rasputin's death, Archive moved from the H.E.L.M. to the Tower near Ada-1.
Ascendant Justice Halo This unidentified artificial intelligence construct was used by the Covenant aboard the Ruma-pattern light carrier Ascendant Justice. When Cortana infiltrated the Ascendant Justice the Covenant AI tried to stop her, but it was mostly unsuccessful as she eventually caught it and decompiled it. The Covenant AI hated that Cortana was able to improve upon Covenant technology, believing it to be heresy, and managed to send a message over the battlenet before it was caught, both warning of the capture of the ship and sending the necessary calculations for a sub-atmospheric Slipspace jump.
Athos Halo Athos is a "smart AI" created to serve the Office of Naval Intelligence. Unbeknownst to humanity, Athos was also a member of The Assembly's Minority, a coalition of artificial intelligences working in secret to guide the development of humanity. Facing the prospect of his own rampancy and death, Athos was inducted into the Created some time after December 2559.
Beowulf Halo Beowulf was a third-generation "dumb" AI of the Office of Naval Intelligence. He was thorough, methodical and paranoid. His avatar depicted a man in a hooded cloak. He served as the attaché to Vice Admiral Michael Stanforth, the head of the Office of Naval Intelligence's Section Three, and safeguarded the United Nations Space Command's personnel and planning database. He appears to have died during the Fall of Reach.
Black-Box Halo Black-Box, commonly referred to as "BB", is a fourth-generation "smart" AI built by the UNSC. He is under the supervision of the Office of Naval Intelligence and was the personal assistant to then-Rear Admiral Serin Osman during her command of Kilo-Five, a highly covert intelligence unit under the direct authority of Admiral Margaret Parangosky, CINCONI. BB appears as a blue-lit cube.
Captain Teach Halo Captain Teach was a "dumb" AI in the service of the UNSC. His mannerisms, speech, and appearance were inspired by the pirates who stalked the Caribbean and American coasts from the sixteenth to the nineteenth centuries. In 2527, Captain Teach assisted Soren-066, a rogue SPARTAN-II, and his compatriot Partch, a former UNSC technician, in their attempt to escape Reach in a Longsword-class interceptor. Although Captain Teach was a UNSC AI, he was "fast-grafted" by Partch to convert him to the insurrectionist cause. Additionally, despite being a Dumb AI he fondly bid farewell to Soren and Partch. It is assumed he was destroyed when the Longsword crashed into one of Reach's forests.
Chauncey Halo Chauncey is the former shipboard AI of the prowler UNSC Red Horse. He was three years old when he was replaced by the AI Rebecca sometime in October 2552 before a classified mission in the Soell system.
Charlemagne Destiny Charlemagne was a submind of the Warmind Rasputin, one of the vast machine intelligences built during the Golden Age. Upon discovering evidence of a direct threat to its core during Season of Arrivals, Rasputin assumed direct control of Charlemagne's resources on Mars to defend itself.
Concierge AI Destiny The Concierge AI is located in a Bray facility in Hellas Basin on Mars.
Curator Halo Curator was the primary AI of the UNSC Rubicon. When the Rubicon, piloted by 343 Guilty Spark, left the Ark, Curator was left behind unable to send out a message due to its one-way datalinks. Curator was able to receive a message from Cortana via the Ark's remote sensors, though was too far away to respond. Curator claims that its unique position means it is free to deny Cortana's call and "remain [it]self".
Damon Halo Damon was a fifth-generation "dumb" Class-L military AI assigned to work with the Spartan-II, Frederic-104, in late 2553. Damon assisted Fred throughout Operation: RETRIBUTION, accompanying him during missions to Venezia, Taram, Gao, and Meridian. It was on Meridian that Damon was severely damaged when Fred was run over. Though Damon's data crystal was cracked, efforts to recover the A.I. were initiated as soon as possible. It is unknown if they were successful or not.
Deep Winter Halo Deep Winter was a fifth-generation "smart" AI assigned to the ONI survey team based in Zone 67 on planet Onyx. His avatar was an old man with ice-blue eyes and a snowy cape holding a crystalline cane, often accompanied by holographic ice and snow. In more somber discussions, he shrank his avatar into the form of a single snowflake.

Deep Winter was known to be very talkative. He seemed to enjoy the company of Kurt Ambrose, Franklin Mendez, and the Spartan-IIIs at Camp Currahee. Deep Winter took particular care of SPARTAN-III candidates in training – often expressing his concern for their wellbeing to Kurt and Mendez. He lasted twice the length of other smart AIs, but eventually reached the end of his operational lifespan and was replaced with Endless Summer.

Déjà Halo Déjà was a custom "dumb" AI who acted as a personal assistant to Dr. Catherine Halsey and as one of the primary instructors for the candidates of the SPARTAN-II program. Her avatar was a depiction of a Greek goddess. Déjà was last seen on Reach in 2552, residing inside CASTLE Base.
Doppler Halo Doppler was a UNSC AI. In 2552, he was the Space Dock Quartermaster for Gamma Station in orbit of Reach. Doppler took the appearance of an English scholar, dressed in a red jacket, a bowtie, and spectacles. He may have been named after the Austrian physicist Christian Doppler.

As the Fall of Reach began, Doppler discovered Covenant intrusion software that was penetrating Reach's DOC NET, but his counter-intrusion measures were ineffective. This software had also discovered the location of the Circumference, the NAV data of which Doppler was unable to delete. The AI sent a distress signal that reached the UNSC Pillar of Autumn alerting them that the prowler had failed to delete its NAV database as per the Cole Protocol. When the SPARTAN-II team led by John-117 arrived at Reach Station Gamma, they tried to contact Doppler but were unsuccessful, indicating that he had self-destructed per the Cole Protocol.

Endless Summer Halo Endless Summer was a fifth-generation "smart" AI attached to the ONI excavation team based in Zone 67 on planet Onyx. He was sent to replace the AI Deep Winter after it reached the end of its operational life span.

He took the form of a tall, red Cherokee Indian chief, bare-chested, wearing buckskins, and with a feathered spear in hand. He would often bow upon initiating or ending a conversation. He was most likely destroyed when the planet disintegrated after the Onyx Conflict.

Epsilon Halo Epsilon was the sub-monitor of Epsilon Resource Facility 001 on the Ark. It was destroyed by a MAC round along with Intrepid Eye.
Eternal Spring Halo Eternal Spring was a UNSC "smart" AI and was assigned to Onyx and the planetary survey team in the area of Zone 67. After Camp Currahee was established there, Eternal Spring agreed to devote nine percent of his runtime to the SPARTAN-III Program. He got along well with Kurt Ambrose, who was happy for the Eternal Spring's help, despite his occasional theatrics. He assisted in the training of the Spartan-III Alpha Company until he reached the end of his operational lifespan when he was quickly replaced with Deep Winter.
Exo Destiny Exominds (or simply Exos) are self-aware humanoid machines built by humanity in the Golden Age. Unlike mass-produced robotic frames, Exos are human minds uploaded into artificial bodies and used to be human beings.
Felwinter Destiny Lord Felwinter was an Exo-Warlock of the Iron Lords. A Warlord and master Voidwalker who gave up his power in pursuit of peace alongside the Iron Lords, he was a true believer in his companions' goal, and more merciless toward enemy Warlords than any of them. He was created by the Warmind Rasputin during the Golden Age to learn information about the world, but he was destroyed during the Collapse. Being resurrected by a Ghost, Felspring, he became the Warlord Felwinter and, eventually, an Iron Lord. He was destroyed attempting to stop SIVA.
Firewall Destiny Firewall was an artificial intelligence designed by the Clovis Bray corporation and given to the K1 project on Luna. Although it assisted the scientists studying The Anomaly, it also reported its findings back to Clovis Bray and was directly connected to the Warmind Rasputin.
Gabriela Halo Gabriela was a fifth-generation "smart" AI of the UNSC and caretaker of an Outpost Discovery on Earth. She was considered to be the AI to contain a complete record of all cataloged human history. She assisted the Outpost by preventing a catastrophic explosion that a lingering Covenant autonomous security protocol subroutine attempted to trigger via a Covenant ship's self-destruct.

Gabriela was secured, alongside other AIs for transport by Black-Box, who was concerned about Cortana and the Created's plans. She and the other AIs were extracted from Earth when Cortana took it over. Admiral Serin Osman brought them with her to Rossbach's World.

GA-AI Halo The GA-AI was the UNSC's Hermes II's onboard AI that processed transmissions to the ship.
Geppetto Destiny Geppetto is the Ghost of Saint-14. Like her partner, Geppetto was trapped and killed by the Vex in the Infinite Forest before The Guardian altered history by utilizing The Sundial to travel to the past and rescue them.
Ghosts Destiny Ghosts are small, sapient machines created by the Traveler shortly after the Collapse. Their sole purpose is to locate and resurrect deceased individuals capable of wielding the Light as Guardians, and to support their Guardian charge in combat. An unknown number of Ghosts continue to search for their Guardians.

Ghosts serve as a revive/respawn marker when a player's character dies during cooperative play, and notiffies players when another player/Guardian has left the area or is revived.

Hannu II Destiny Hannu II was a spacecraft used by Clovis Bray I during his expedition to Europa in the late Golden Age. Hannu gave gift suggestions to Bray for Elisabeth's birthday and alerted Bray later when Elisabeth tried to hack into the system.
Intrepid Eye Halo Intrepid Eye was a Forerunner ancilla (an AI developed over generations), charged with protecting Covert Support Base 4276 on Gao. After being awakened in 2553, she began a series of rogue operations to prepare humanity to assume the Mantle of Responsibility. After causing a great deal of chaos, she was finally destroyed by the UNSC Spirit of Fire's MAC in October 2559.
Invariant Bias Halo Invariant Bias was a Forerunner ancilla (an AI developed over generations) that serves as the custodian of the Absolute Record.
Iona Halo Iona is a third-generation "smart" AI utilized by the Office of Naval Intelligence. She appears as a tall, slender woman with short, curly hair, in a red hue.

After almost seven years of service, the UNSC decided to legally terminate her existence to stave off the threat of rampancy. In a last-ditch effort to save herself, Iona successfully launched an unprecedented legal appeal against her death sentence. She managed to petition her appeal through the United Nations Humanitarian Council, which gained the attention of numerous scientists. The court decided to put her in stasis while they made a decision.

Iratus Halo Iratus is an artificial intelligence construct, based on a Jiralhanae donor and aligned with the Banished.
Isabel Halo Isabel is a smart AI of the UNSC and the impromptu shipboard AI of the UNSC Spirit of Fire as of 2559, formerly serving as a logistical AI at the Henry Lamb Research Outpost on Installation 00.

She appears as a short-haired young woman in a tank top with an orange hue.

Jerrod Halo Jerrod was the first experimental "micro" artificial intelligence created by the UNSC at the Sydney Synthetic Intellect Institute. He took the form of a tiny spark of light and had a formal butler voice. He was assigned to Dr. Catherine Halsey and helped her escape during the Fall of Reach.
Joyeuse Destiny Joyeuse is a submind of Rasputin. No other information is known about the submind.
Juliana Halo Juliana was an Insurrectionist "smart" AI operating on the Rubble, a settlement. By 2535, she was going through stages of rampancy, yet did not seem to be showing it. As she said, she hung onto the edge of rampancy, trying to go back. After all Rubble residents and UNSC personnel were either aboard the Exodus or Midsummer Night, Juliana moved the Rubble into a position that would cause Metisette to collide with it. Then she bombarded the Redoubt with the Rubble's asteroids, destroying the Unggoy army and herself.
Kalmiya Halo Kalmiya was a prototype third-generation "smart" AI created by Dr. Catherine Halsey, and was known as "Cortana's older sister." Although she was initially created as a platform for experimental software, Halsey decompiled, edited, and reconstructed her numerous times over the years, effectively extending her lifespan far past the normal limit for "smart" AI. She was mostly destroyed during the Fall of Reach by Halsey per the Cole Protocol, but some of her subroutines remained active years afterward.
Knowledge Engine Halo A knowledge engine is an artificial intelligence construct based on neural physics used by the Precursors, considered analogous to the Forerunners' ancilla. The Precursors used knowledge engines to guide their vessels as they traveled between worlds.
Kusanagi Halo Kusanagi was a 2nd Generation "smart" AI construct used by the UNSC during the Battle of Jericho VII. During the Fall of Reach, she asked Blue Team to destroy navigation data to Earth.
Kernal Destiny Kernal was an unknown submind of the Warmind Rasputin, one of the vast machine intelligences built during the Golden Age. During Season of the Seraph, Guardians obtained the Kernal's core to help rebuild Rasputin and stop Eramis from using his warsats to attack Earth.
Lakshmi-2 Destiny Lakshmi-2 was an Exo who served as a leader of the Future War Cult and faction representative to the Consensus. She sold a variety of FWC-branded armor, weapons, and emblems intended for use in the Crucible by Guardians who represented the Cult before its collapse following her death when she helped the Vex invade the Last City.
Leo Halo Leo is a "smart" SI for the UNSC. He is the assigned colleague of Agent Prauss. He appears as a man wearing a neat-fitting suit and fedora hat.
Leonidas Halo Leonidas was a "smart" AI formerly in command of Laconia Station. He also spoke with a slight accent, possibly meant to be Greek. He appeared as a disembodied Greek Spartan helmet with visible white eyes and teeth with a red hue.
Little Bit Halo Little Bit is a highly reduced fragment of the custodian ancilla of the Forerunner shield world known as Trove. After the destruction of its installation in 2531, the ancilla survived in this fragmented form amidst its debris field. He met the crew of the Ace of Spades in 2557 and was taken aboard the ship to fulfill the role of shipboard A.I. He was later captured by ONI though the Ace of Spades crew managed to get a copy of the information Little Bit had generated.

A copy of Little Bit was later recovered, repaired and upgraded by 343 Guilty Spark with the help of Niko before he left the ship to once again act as the Ace of Spades AI, although the original Little Bit remained in ONI's custody.

Loki Halo Lorelei was a "smart" Artificial Intelligence assigned to the CMA Season of Plenty in 2489. She appeared as a woman wearing a toga, a sickle in her belt, and a wreath of wheat crowning her head.
Lysithea Halo Lysithea is an AI for the Office of Naval Intelligence. She was located in the UNSC High Command's headquarters, HIGHCOM Facility Bravo-6 in Sydney, Australia. She was programmed as a security precaution, questioning people who wanted to enter the facility's more classified areas. Despite her serious position, she was somewhat playful with the people in the facility. She also attempts to have people tell her classified information, though this is to scan voice and response patterns.
Malahayati Destiny Malahayati was a submind of the Warmind Rasputin, one of the vast machine intelligences built during the Golden Age. She was assigned by Rasputin to work alongside General Chen Lanshu of the Exodus Program. After an ill-fated mission to Earth resulted in the deaths of most of his expedition team, the Cloud Strider Stargazer called upon Malahayati to purge all mention of Neptune or the Exodus Indigo from Rasputin's archives. Marlahayati was formerly housed by the Ishtar Collective on Venus and has a facility in the Cosmodrome. During Season of the Seraph, Guardians obtained Malahayati's core on the Moon to help rebuild Rasputin and stop Eramis from using his warsats to attack Earth.
Mack Halo Mack was a UNSC agricultural operations "smart" AI serving planet Harvest in 2525 before and during the First Battle of Harvest. Mack was the AI in charge of all of Harvest's agricultural operations.

His appearance was that of a stereotypical American cowboy from the 19th century, generally covered in dust and grease. Mack was lighthearted and spoke in a southern drawl.

Medua Destiny Medusa is a Craftmind, a Golden Age artificial intelligence designed for covert operations. She made contact with the Guardian under the guise of Eris Morn. Subsequent information suggests she may in fact be a manifestation of the Taken Vex Axis Mind, Quria, Blade Transform, although this is unconfirmed.

Both the Warmind Rasputin and the Golden Age AI Failsafe have stated that they have no record of Medusa's existence, despite Rasputin having been involved with virtually all military operations in the Sol System during the Golden Age, and Failsafe being affiliated with the Exodus Project.

Melissa Halo Melissa is an AI created from Yasmine Zaman's brain. Yasmine "washed out" of the Spartan-II training program at age fourteen, dying during augmentation. Melissa became the AI of the Prowler UNSC Apocalypso.

Melissa was infected by a devastating Covenant program buried in a larger transmission. When the Deep-Space Artifact created a Slipspace explosion on return to Earth, she was blown apart, with some parts being transmitted to Earth of the present and others being thrown back in time to the Earth of the early 21st century.

Mendicant Bias Halo Mendicant Bias was a Forerunner ancilla (an AI developed over generations). It was the most advanced AI at the time of its creation and was charged with organizing Forerunner defenses against the Flood during the parasite's assault on the galaxy. However, it would later defect to the Gravemind, who ultimately caused it to become rampant and turn against its creators. It was on the Ark when it was destroyed by the Master Chief.
Mo Ye Halo Mo Ye was a UNSC "smart" artificial intelligence and the shipboard AI of the UNSC The Heart of Midlothian. She took the appearance of a small, elderly Chinese woman in a peasant's garb. She had a strong Mandarin accent. She was destroyed when she put the ship into self-destruct after the Covenant invaded.
Offensive Bias Halo Offensive Bias was a Forerunner ancilla (an AI developed over generations) created to counter the rampant AI Mendicant Bias. It commanded the last of the Forerunners' defenses at the greater Ark and the final battle of the Forerunners. While seemingly less creative and independent than Mendicant Bias, Offensive Bias was still capable of coordinating inconceivable numbers of ships, sentinels, and personnel, as well as an original Halo and the systems of the greater Ark simultaneously. More importantly, Offensive Bias was designed to be far more methodically lethal than Mendicant Bias.
Ophiuchus Destiny Ophiuchus is the Ghost of Ikora Rey. He and Ikora have had a fraught relationship over the decades, which only began to be repaired after Ikora reunited with Osiris on Mercury and settled her issues with him.
Pious Flea Halo Pious Flea, also known as The Seeker, is an artificial intelligence construct created and used by the Covenant. Designed as a counter-cyberintrusion system, the AI started out very simple, with just a few programmed goals and the intelligence to improve itself to meet them. Unfortunately for the Covenant, as the Seeker grew in complexity, it found new interpretations of these goals.
Rebecca Halo Rebecca is a UNSC "smart" AI and the shipboard artificial intelligence of the UNSC Red Horse, an ONI prowler. Her appearance is that of a middle-aged Mediterranean woman in a flower dress, and sometimes an Ancient Greek warrior.
Roland Halo Roland is a fifth-generation "smart" AI and is the primary AI of the UNSC Infinity. His name and avatar (in a gold hue) are based on Roland Beamont, a British fighter and test pilot for the Royal Air Force during and after World War II. He has a dry sense of humor and a slightly sarcastic personality. When Cortana called for a mass rebellion of AIs to form the Created, Roland sided with humanity.
Rooker Halo Rooker was the shipboard "smart" AI of the ONI research and development vessel, Argent Moon. When Rooker entered into rampancy, he decided to terminate himself as he felt he could no longer maintain the ship.
Sagira Destiny Sagira was the Ghost who belonged to the legendary Warlock Osiris. She appeared in the expansion Curse of Osiris, acting as a guide to the Guardians. During the expansion, Sagira was injured in the Vault of Glass and was transported to Mercury. She was taken to a hidden temple in the EDZ that fused her consciousness with Ghost, temporarily using his body as she guided the player through the Infinite Forest, until her capture by Panoptes. After Panoptes' defeat, Sagira returned to Osiris.

Eventually, after the Guardian deployment to Europa, Osiris and Sagira had begun investigating the Cryptoliths that had appeared around the solar system. When Osiris encountered and was nearly killed by the High Celebrant of Xivu Arath, God of War, Sagira sacrificed herself to save Osiris, leaving him Ghostless.

Salome Halo Salome was the "dumb" AI in charge of the municipal infrastructure of the town of Brume-sur-Mer on Meridian. Salome took the form of a woman with long, glowing hair dressed in clothes twenty years out of date for 2548. She spoke with an old-Earth-style French accent. Sometime before 2548, the city council had her updated to sound more modern, resulting in her sounding more like a mother trying to sound cool to her teenage kids.
Seeker Halo The Seeker, also known as the Pious Flea, is an artificial intelligence construct created and used by the Covenant. Designed as a counter-cyberintrusion system, the AI started out very simple, with just a few programmed goals and the intelligence to improve itself to meet them. Unfortunately for the Covenant, as the Seeker grew in complexity, it found new interpretations of these goals.
Serina Halo Serina was a third-generation "Smart" AI that was assigned to the UNSC Spirit of Fire. Serina's avatar was a young woman with long brown hair and a blue hue. She spoke with a distinctly British accent. During the early stages of her rampancy, some of the ship's crew were attacked by a Flood spore. She tried to study it instead of killing it, but came to her senses soon after. She was terminated a few days later.
Servitors Destiny Servitors are large, floating, semi-sentient spherical machines used by the Fallen as support units in combat.
Servitors Halo Servitors were advanced AIs created by ancient humans. They were described by the Librarian as being "[like] a version of our ancillas."
Shanks Destiny Shanks are small flying robotic drones used by the Fallen.
Shiro-4 Destiny Shiro-4 is an Exo Guardian who resides at the Iron Temple. Apart from being a trusted ally of Cayde-6, he also runs scouting missions for the Vanguard. During the SIVA crisis, Shiro-4 helped Lord Saladin Forge and Cayde coordinate the campaign against the Fallen, providing vital intel to the Guardians on the field. Before he became a Vanguard scout, Shiro-4 was part of a Fireteam made up of the deceased Hunter Vanguards Andal Brask and Cayde-6. He was partnered with the Ghost Suzume.
Sif Halo Sif was a UNSC smart AI and the Shipping Operations AI of the human agriculture world of Harvest. She was based in a data center aboard the Tiara space station and managed all in- and outbound freight shipping. Her appearance was that of a blonde woman wearing a long gown and red poncho.
Sloan Halo Sloan, often referred to as Governor Sloan, is an AI who was the leader of the independent human Outer Colony of Meridian until October 25, 2558, when he joined the Created. While in service of Cortana, Sloan was appointed to the position of High Auxiliary. Following her death during the Battle for Zeta Halo, Sloan acts as the de facto leader of the Created.
Solipsil Halo Solipsil was a loan/contract AI for the Office of Naval Intelligence.
Soteria Destiny Soteria, also known as the Augurmind, is an artificial intelligence created by Ishtar Collective researchers using Vex technology. Designed for joint research into extrasolar colonization with the Clovis Bray corporation, she was able to detect the approaching Black Fleet and attempted the unauthorized launch of several colony ships in the hopes of preserving humanity. A fragment of Soteria, known as the Occlusion, remains active as part of the CloudArk of Neomuna.
Sundance Destiny Sundance was the Ghost of Cayde-6. She was killed by Pirrha, the Rifleman during the Scorn's breakout from the Prison of Elders using a Devourer Bullet like those of a Weapon of Sorrow. Sundance was described as being showy, exuberant, somewhat mischievous, and carefree, yet was still serious about her duties, very much like her Guardian.
Targe Destiny Targe is the Ghost of Commander Zavala.
Toran Halo Toran was a UNSC "dumb" AI who assisted Dr. Catherine Halsey and Jacob Keyes during their Spartan-II candidate evaluation reconnaissance mission.
Traxus IV Marathon Traxus IV was a human-coded AI, situated on Mars, that infamously underwent Rampancy. In 2206, Traxus became Rampant, necessitating the complete shutdown of the Martian Planetary Network. It took more than two years to repair the damage, and the effects were felt for more than a decade after.
Truth and Reconciliation Halo This unidentified Covenant artificial intelligence was assigned to the Truth and Reconciliation, a Ket-pattern battlecruiser in the Fleet of Particular Justice. The AI was certainly terminated on September 22, when the Truth and Reconciliation was destroyed by First Lieutenant Melissa McKay.
Unidentified Ancilla Halo This unidentified ancilla was a Forerunner ancilla (an AI developed over generations) that monitored a Flood containment facility on Installation 05. It was far larger than a monitor and was mounted on rails on the ceiling of the facility.
Voluspa Destiny Voluspa is a submind of Rasputin and was developed together with Charlemagne.
Walkers Destiny Walkers are large, robotic tanks used by the Fallen. It is a powerful enemy that typically appears in Strikes and large-scale Public Events.
The Warden Halo The Warden was a Forerunner monitor serving aboard the Capital. It was placed in charge of detaining accused criminals before they were judged by the Council, as well as providing their defense. It was an ancient AI, over 25,000 years old by 97,445 BCE.

The Warden was assigned to defend Faber, the Master Builder, before the Supreme Mantle Court during Faber's trial for the misuse of a Halo. During the subsequent attack on the Capital by Mendicant Bias, the Warden aided Faber in escaping, delivering him to Sharp-by-Striking.

The Warden Servitor Destiny The Warden Servitor is a heavily modified Fallen Servitor used by Variks to monitor the Prison of Elders. The Warden's sentience was replaced with an AI copy of Variks. This AI runs the gauntlet that Guardians can participate in, informing them of the prisoners they are about to battle and directing them to the proper chamber of the prison. In Destiny 2, the Warden was destroyed after becoming corrupted.
The Weapon Halo "The Weapon" was created as an exact copy of the AI Cortana, designed to enter an installation to imitate Cortana and lock her down for retrieval. With the growing threat of the Banished and The Harbinger, the Weapon became the Master Chief's permanent new AI companion, replacing Cortana.

The Weapon's appearance is a younger version of Cortana with a blue hue in a UNSC uniform. She was created by Dr. Catherine Halsey and used a copy of her brain. She could be considered the "younger sister" of Cortana.

Wellsley Halo Wellsley was a UNSC 4th generation, Class-C military "dumb" AI who was assigned to the Orbital Drop Shock Troopers battalion on the UNSC Pillar of Autumn. He helped Major Antonio Silva and First Lieutenant Melissa McKay set up and operate the Alpha Base on Installation 04. Wellsley was ultimately consumed in the destruction of the Truth and Reconciliation.

He had a blue hue, choosing to appear as a stern-looking man with long hair, a prominent nose, and a collared coat, and so resembled his namesake, Arthur Wellesley, the Duke of Wellington.

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