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| {{Status|Canon}} | | {{Era|Forerunner|Post}} |
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| {{AI infobox | | {{AI infobox |
| |image = [[File:HE20 Absolute Record Ancilla.jpg|280px]] | | |image = [[File:HE20 Absolute Record Ancilla.jpg|280px]] |
| |name = Invariant Bias | | |name = |
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| '''Invariant Bias'''{{Ref/Book|Id=Enc22p6|Enc22|Page=6-7}} is a [[Contender-class artificial intelligence|Contender-class]] [[ancilla]] that serves as the custodian of the [[Absolute Record]].{{Ref/Site|URL=https://www.halowaypoint.com/news/the-new-halo-encyclopedia-is-out-today|Site=Halo Waypoint|Page=The New Halo Encyclopedia is Out Today|Quote='''INVARIANT BIAS''' - The Contender-class ancilla that serves as the custodian of the Absolute Record.|D=19|M=12|Y=2022}}
| | This [[Contender-class artificial intelligence|Contender-class]] [[ancilla]] was the custodian of the [[Absolute Record]]. |
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| ==Biography== | | ==Biography== |
| ===Forerunner-Flood War===
| | The custodian had been commissioned over a hundred millennia ago to guard the Absolute Record, until [[Reclaimer|its new custodian]] would arrive, commissioned by the [[Librarian]] to carry out the Reclamation. However, after seeing the betrayal of [[Mendicant Bias]] when he turned allegiance to the [[Flood]], the custodian grew suspicious about who it should trust with the Record's power.<ref name="twentyone">'''Halo: Escalation''', ''Issue 21''</ref> |
| Invariant Bias was commissioned over a hundred millennia ago to guard the Absolute Record, until [[Reclaimer|its new custodian]] would arrive, commissioned by the [[Librarian]] to carry out the Reclamation. However, after seeing the betrayal of [[Mendicant Bias]] when he turned allegiance to the [[Flood]], the custodian grew suspicious about who it should trust with the Record's power.{{Ref/Comic|Id=twentyone|HE|Issue=21}}
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| ===Janus Key conflict===
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| In mid-[[2558]], the Absolute Record was visited for the first time in ages, by the {{Class|CAS|assault carrier}} ''[[Song of Retribution]]'', the flagship of [[Jul 'Mdama]] and [[Catherine Halsey]]. Unknown to them, Spartans [[Sarah Palmer]], [[Gabriel Thorne]], and [[Holly Tanaka]] along with scientist [[Henry Glassman]] had stowed away aboard the vessel, the ancilla sensing the presence of the hidden humans.{{Ref/Comic|HE|Issue=20}} 'Mdama and Halsey met the ancilla with an enormous warrior escort, many of whom were uncomfortable with the numerous Sentinels inspecting them. When Halsey demanded the ancilla open the Record to her, it refused and instead summoned the other humans of the ''Retribution''.
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| Despite Halsey having been given the [[Janus Key]] by the Librarian, the device that would unlock the Record, the ancilla still felt it could not trust her as it did not know the circumstances of how Halsey got the Key. It thereby prepared to test the visitors to see who deserved to be the new custodian of the Record. At this point, some of Jul's [[Sangheili]] attacked the Sentinels, so the ancilla responded by opening fire and then evacuating most of the floor, killing all the Sangheili but Jul and leaving the humans on platforms.{{Ref/Reuse|twentyone}}
| | In mid-[[2558]], the Absolute Record was visited for the first time in ages, by the {{Class|CAS|assault carrier}} ''[[Song of Retribution]]'', the flagship of [[Jul 'Mdama]] and [[Catherine Halsey]]. Unknown to them, Spartans [[Sarah Palmer]], [[Gabriel Thorne]], and [[Holly Tanaka]] along with scientist [[Henry Glassman]] had stowed away aboard the vessel, the ancilla sensing the presence of the hidden humans.<ref>'''Halo: Escalation''', ''Issue 20''</ref> 'Mdama and Halsey met the ancilla with an enormous warrior escort, many of whom were uncomfortable with the numerous Sentinels inspecting them. When Halsey demanded the ancilla open the Record to her, it refused and instead summoned the other humans of the ''Retribution''. |
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| The custodian gave the two remaining parties a hypothetical scenario, in which a sentient species (depicted by [[Yonhet]]) turned out to have bodies resistant to the Flood. Harvesting live specimens would give a thirty-five percent chance of a vaccine, while harvesting dead bodies offered willingly would have a thirty-three percent chance. The UNSC group responded with the peaceful option while Halsey chose enslavement for the entire chance, the ancilla commending both. It then asked both parties whether their opponents being tested should be evacuated alive or killed. Before it could get an answer, Halsey hacked into the ancilla and took control of the facility herself.{{Ref/Reuse|twentytwo}}
| | Despite Halsey having been given the [[Janus Key]] by the Librarian, the device that would unlock the Record, the ancilla still felt it could not trust her as it did not know the circumstances of how Halsey got the Key. It thereby prepared to test the visitors to see who deserved to be the new custodian of the Record. At this point, some of Jul's [[Sangheili]] attacked the Sentinels, so the ancilla responded by opening fire and then evacuating most of the floor, killing all the Sangheili but Jul and leaving the humans on platforms.<ref name="twentyone"/> |
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| In backup of its forceful hijack, a portion of the ancilla's memory was downloaded into a Sentinel, which requested the Spartans' aid in regaining control.{{Ref/Comic|Id=twentytwo|HE|Issue=22}} It directed them to a maintenance chamber where the Spartans inputted codes to reactivate its primary shell. Once active, it captured Halsey and reprimanded her for being so hasty in controlling the Record. It then took the Janus Key and denied her further access to the Record.{{Ref/Comic|HE|Issue=24}}
| | The custodian gave the two remaining parties a hypothetical scenario, in which a sentient species (depicted by [[Yonhet]]) turned out to have bodies resistant to the Flood. Harvesting live specimens would give a thirty-five percent chance of a vaccine, while harvesting dead bodies offered willingly would have a thirty-three percent chance. The UNSC group responded with the peaceful option while Halsey chose enslavement for the entire chance, the ancilla commending both. It then asked both parties whether their opponents being tested should be evacuated alive or killed. Before it could get an answer, Halsey hacked into the ancilla and took control of the facility herself.<ref>'''Halo: Escalation''', ''Issue 22''</ref> |
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| ===Endless threat===
| | In backup of its forceful hijack, a portion of the ancilla's memory was downloaded into a Sentinel, which requested the Spartans' aid in regaining control.<ref name="twentythree">'''Halo: Escalation''', ''Issue 22''</ref> It directed them to a maintenance chamber where the Spartans inputted codes to reactivate its primary shell. Once active, it captured Halsey and reprimanded her for being so hasty in controlling the Record. It then took the Janus Key and denied her further access to the Record.<ref>'''Halo: Escalation''', ''Issue 24''</ref> |
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| [[File:Enc22 InvariantBias Emblem.svg|thumb|250px|The insignia used by Invariant Bias in its communications with Adjutant Revendicate.{{Ref/Reuse|Enc22p6}}]]
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| Following the defeat of The [[Harbinger]] on [[Installation 07]] in [[2560#May|May 2560]], Invariant Bias was contacted by [[Adjutant Revendicate]] - one of the installation's sub-[[monitor]]s. Invariant was shocked to learn that Revendicate was the former-[[Auditor]], and asked what information Revendicant wished to access from the Absolute Record. Revendicate instead declined, instead wishing to deposit information into the archive collected from various sources, intended for archival in the event that the Harbinger's plan succeeded and the [[Xalanyn]] were freed. Invariant reviewed the information before ultimately accepting it into the archive, with the two ancilla agreeing that the strength of [[John-117]] may be all that would save the [[Milky Way|galaxy]] from the Endless threat.{{Ref/Reuse|Enc22p6}}{{Ref/Book|Enc22|Page=487}}
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| ==Description== | | ==Description== |
| Invariant Bias's shell resembles that of the fellow Contender-class [[Mendicant Bias]], being shaped in a rough teardrop shape with three photoreceptor "eyes". These eyes are individually blue, green, and yellow. In the center of its shell is the [[Eld]] symbol. The custodian's shell can levitate and is roughly three times the size of a Spartan or Sangheili.
| | The ancilla's shell resembled that of the fellow Contender-class [[Mendicant Bias]], being shaped in a rough teardrop shape with three photoreceptor "eyes". These eyes were individually blue, green, and yellow. In the center of its shell was the [[Eld]] symbol. The custodian's shell could levitate and was roughly three times the size of a Spartan or Sangheili. |
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| The ancilla controls an army of [[Aggressor Sentinel]]s, and can also reshape the facility's walls and floors, including offensively to send victims to a fatal fall.
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| In case of sudden destruction or disabling, the ancilla's mind is programmed to enter a local Sentinel, which then can be restored to its original body through reactivation. On its own the process can take [[seven]] hours, but with the aid of helpers it can be sped up to roughly twenty minutes.{{Ref/Reuse|twentytwo}}
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| ==Trivia==
| | The ancilla controlled an army of [[Aggressor Sentinel]]s, and could also reshape the facility's walls and floors, including offensively to send victims to a fatal fall. |
| Invariant Bias' archive is the in-universe basis for the [https://twitter.com/search?q=%23FictionFriday%20(from%3AHalo)&src=typed_query&f=live #FictionFriday] posts uploaded by the official ''Halo'' Twitter account, beginning in [[2023]]. All of the unique graphics produced include Invariant Bias' sigil in the top-right corner, and are themed into Vehicle, Weapon, Character, Enemy, [[High Value Target|Target]], and Tech databases.
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| ==Gallery==
| | In case of sudden destruction or disabling, the ancilla's mind was programmed to enter a local Sentinel, which then could be restored to its original body through reactivation. On its own the process would take [[seven]] hours, but with the aid of helpers it could be sped to roughly twenty minutes.<ref name="twentythree"/> |
| <gallery>
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| File:Custodian HE LE cover.png|The custodian's shell.
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| File:Halo Escalation Library Edition Volume 2 full.jpg|Invariant Bias on the front cover of the ''Halo: Escalation'' Library Edition vol.2 cover.
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| File:HE21 Absolute Record Ancilla.jpg|The custodian emerges.
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| File:HE21 Greetings.jpg|Dr. Halsey addresses the Contender-class AI.
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| File:HE21 Brawl.jpg|
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| File:HE21 Begone.jpg|
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| File:HE22 ancilla.jpg|The Record's custodian prepares to start a trial.
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| File:HE22 Hax.jpg|The custodian is disabled.
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| </gallery> | |
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| ==List of appearances== | | ==List of appearances== |
| *''[[Halo: Escalation]]'' | | *''[[Halo: Escalation]]'' {{1st}} |
| **''[[The Absolute Record]]'' {{1st}}
| | *''[[Halo Mythos: A Guide to the Story of Halo]]'' {{Mo}} |
| *''[[Halo Mythos]]'' {{Mo}} | |
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| ==Sources== | | ==Sources== |
| {{Ref/Sources}}
| | <references/> |
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| {{Forerunner AI}} | | {{Forerunner AI}} |
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| [[Category:Forerunner A.I.]] | | [[Category:Forerunner A.I.]] |
| [[Category:AI characters]]
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