Editing Déjà

{{Status|Canon}}
{{AI infobox
|name=Déjà
|image=[[File:Deja 2.png|275px]]
|began=[[2510#December|December 22, 2510]]{{Ref/Book|Id=Enc22P109|Enc22|Page=109}}
|ended=[[2552#August|August 30, 2552]] {{C|presumed}}
|gender=Female programming{{Ref/Novel|Id=FoR3|TFoR|Chapter=3}}
|description=Greek goddess{{Ref/Reuse|FoR3}}{{Ref/Film|Id=AnimatedFoR|TFoRAS}}
|color=Blue{{Ref/Comic|Id=FoRBC|FoRBC}}{{Ref/Reuse|AnimatedFoR}}
|affiliation=*[[United Nations Space Command]]{{Ref/Reuse|FoR3}}
*[[Catherine Halsey|Dr. Catherine Halsey]]{{Ref/Reuse|FoR3}}
|function=*Teacher for the Spartan-II candidates{{Ref/Reuse|FoR3}}{{Ref/Reuse|AnimatedFoR}}{{Ref/Reuse|Enc22P109}}
*Assistant to Dr. Catherine Halsey{{Ref/Reuse|AnimatedFoR}}{{Ref/Reuse|Enc22P109}}
|battles=
|number=DJA 0552-1{{Ref/Reuse|Enc22P109}}
}}

'''Déjà''' ([[AI Serial Number]]: '''DJA 0552-1''') was a custom [[Dumb AI|"dumb"]] [[artificial intelligence]] who acted as a personnal assistant to [[Catherine Halsey|Dr. Catherine Halsey]] and as one of the primary instructors for the candidates of the [[SPARTAN-II program]].{{Ref/Reuse|FoR3}}{{Ref/Reuse|Enc22P109}}

==Operational history==
[[File:HJ Deja.png|thumb||left|100px|Déjà as drawn by Dr. Halsey in [[Dr. Halsey's personal journal|her personal journal]].]]
===Teacher of Spartans===
Déjà served as an educational AI for the [[SPARTAN-II training]] program, instructing the [[SPARTAN-II Program|SPARTAN-II candidates]] in their first stages of training at [[Reach Naval Academy]] and other facilities on [[Reach]]. Her counterpart, [[Chief Petty Officer]] [[Franklin Mendez]], gave the Spartans rigorous physical training. This, along with Doctor [[Catherine Halsey]]'s [[SPARTAN-II augmentation procedures|physical augmentations]] and eventually [[MJOLNIR Powered Assault Armor|MJOLNIR armor]], made the Spartans more intelligent, stronger, and faster than their non-augmented counterparts.<ref>''Halo: The Fall of Reach''</ref>

Déjà's lessons were the part of the Spartans' training program meant to teach them to employ strategic thinking. She also educated them in history, mathematics, and presumably other fields. In one of her first lessons, she taught the Spartan-IIs about the famous [[Wikipedia:Battle of Thermopylae|Battle of Thermopylae]], where 300 [[Wikipedia:Sparta|Sparta]]ns made a stand against a quarter of a million Persians.<ref>'''Halo: The Fall of Reach''', ''page 47''</ref> Another lesson was about [[seven]] [[list of animals|wolves]] taking down a [[list of animals|moose]], by working as a team. This served as one of the Spartans' earliest lessons about the importance of teamwork; that a wolf alone would be a far less effective hunter than if it were accompanied by its pack.<ref>'''Halo: The Fall of Reach''', ''page 39''</ref> During one of Mendez's training missions, she helped the Spartan trainees when [[John-117]] called her instead of Mendez. Using a mail link, he linked her to an [[Albatross]] dropship to request she show him how to fly it to get the Spartans home. While she couldn't do that, she had him activate the autopilot, allowing her to take control of the craft and fly the Spartans home herself remotely.{{Ref/Novel|Id=FoR5|TFoR|Chapter=5}}

===Halsey's aide===
Déjà often acted as a sounding board for Dr. Halsey, discussing how the Spartan-II Program should be run. For example, the night the program officially began she advised Halsey on how to address the children. They also would discuss the treatment of the individual Spartans, as well as the ethics of their situation. As a "dumb" AI, Déjà would tend to take the less emotional, more clinical side of these discussions: One example is when she asked Doctor Halsey if she was giving [[Soren-066]] the choice to proceed in the program in order to alleviate her own conscience.{{Ref/Anthology|Evo|Story=Pariah}}

On [[2526#March|March 31, 2526]], Doctor Halsey sought Déjà's help in figuring out where a [[Covenant]] [[Ring of Mighty Abundance|supply depot]] was based off a recovered Covenant ''[[kelguid]]'' and the arrival of a supply convoy to [[Etalan]] five days after [[Battle over Etalan|the decimation]] of the [[Fleet of Inexorable Obedience]]'s logistics flotilla. Déjà suggested that the Covenant had instantaneous interstellar communication, allowing for the location they were looking for to be a planet five days slipspace travel from Etalan of which there was [[Zhoist|one]]. During this conversation, Déjà glitched, experiencing several erratic pauses. By this point, Doctor Halsey had traced the source to a sophisticated data miner slipped into her lab's systems by [[Hector Nyeto]] or one of his operatives. She didn't bother to correct it because Nyeto had already gotten access to her most closely guarded data and Doctor Halsey didn't want Nyeto to know that she was onto him. Doctor Halsey realized that Déjà's explanation was the most likely answer for the problem. Déjà then took her leave as [[Colonel]] [[Marmon Crowther]] arrived to talk with Doctor Halsey.{{Ref/Novel|Id=HSS22|HSS|Chapter=22}}

===Fate===
Her current fate is unknown. As a "dumb" AI, her lifespan is, in theory, indefinite. However, Déjà was last seen on Reach in [[2552]], residing inside [[CASTLE Base]]. It is unlikely that her server clusters survived the base's destruction during [[Operation: WHITE GLOVE]].{{Ref/Reuse|Enc22P109}}

==Personality and traits==
Given that she was a "dumb" AI, Déjà tended to be rather stoic and rarely showed emotion. This was shown in her voice pattern, which tended to be very steady and smooth as silk.<ref>'''Halo: The Fall of Reach''', ''page 55''</ref> Déjà's intelligence within her fields of expertise was equivalent to a [[human]] [[Wikipedia:Intelligence quotient|IQ]] of 240.{{Ref/Book|Dr. Halsey's personal journal|Page=44}}

When displaying her avatar, Déjà took on the appearance of a [[List of references to Greek mythology in the Halo series|Greek goddess]].{{Ref/Reuse|FoR3}}{{Ref/Reuse|AnimatedFoR}} She was barefoot and wrapped in the toga, with motes of light dancing about her luminous hair. She could often be seen holding a clay tablet covered with [[Wikipedia:Binary code|binary]] [[Wikipedia:Cuneiform|cuneiform]] markings in her hand.{{Ref/Reuse|FoR3}}

==Trivia==
{{Linkbox|gallery=yes}}
*Déjà's name means "already" in [[Wikipedia:French language|French]].

==Gallery==
===''Halo: Fall of Reach''===
<gallery>
File:Halsey in FoR.png|Déjà alongside Dr. Halsey and Chief Mendez in ''[[Halo: Fall of Reach]]''
File:Deja.png|Déjà and Dr. Halsey.
File:Reach Naval Academy.jpg|Déjà welcoming the Spartans to Reach's Naval Officer's Academy.
File:FoR-Spartan class.png|Déjà preparing the Spartans for class.
File:Deja wolves.jpg|Déjà teaches the SPARTAN-II candidates about wolves.
</gallery>

===''Halo: The Fall of Reach - Animated Series''===
<gallery>
File:Déjà.png|A full-body view of Déjà.
File:TFORAS HalseyDeja.PNG|Déjà assisting Dr. Halsey.
File:TFoR-as-Deja.jpg|The SPARTAN-II candidates being taught by Déjà.
File:TFoR AS HalseyAndDeja.jpg|Concept art for ''Halo: The Fall of Reach - The Animated Series''.
File:HTFORAS_Deja_Paintover.jpg|Textured model of Deja used in the animated series.
</gallery>

==List of appearances==
*''[[Halo: The Fall of Reach]]'' {{1st}}
*''[[Halo: Ghosts of Onyx]]''
*''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''
**''[[Pariah]]''
*''[[Halo: Fall of Reach]]''
**''[[Halo: Fall of Reach - Boot Camp|Boot Camp]]''
*''[[Halo: The Fall of Reach - The Animated Series]]''
*''[[Halo: Silent Storm]]''

==Sources==
{{Ref/Sources}}

{{UNSC AI}}
[[Category:Human AI]]
[[Category:Educators|Deja]]
[[Category:AI characters]]