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Service information

Began service

January 7, 2530

Ended service


Physical information


Female programming


Young tall slender female, with long black hair.

Normal color


Historical information


United Nations Space Command

Primary function

UNSC Spirit of Fire AI Construct

Notable battles

[Source]   [Talk]

Serina, serial number SNA 1292-4, was an Artificial intelligence (AI) construct that was assigned to the UNSC Spirit of Fire, a modified Phoenix-class colony ship.


Little is known about Serina other than the fact that she acts as a Military Advisory AI, which may or may not be her only function.[1] She is a smart AI,[2] which is usually a sign of advanced memory capacity, like Cortana. In contrast, other AI's known throughout the Halo galaxy exhibit only minor aspects of personality. Her avatar is a young female with long hair, and her attire resembles a lab coat. She appears to speak in a generic, or received pronunciation, English accent. Beneath all her sarcastic comments and seemingly uncaring attitude, she turns out to be kinder than she seems.[3] She also appears to have a fascination with human relationships and chocolate.[4]

As the Spirit of Fire was very far away from UNSC territory and traveling without a Shaw-Fujikawa Translight Engine, it is unlikely that Serina was deleted.


  • "Recalling surface squads so we can all die together. Aye, sir!"[5]
  • "Well, this is new...and scary." (Upon seeing the Flood)[1]
  • "The MAC is online and primed. Payback time!"[1]
  • "Expecting trouble, Captain?"
  • "Standard orbit achieved, all systems normal."
  • "So...nothing too difficult, then?"
  • "Here are some reinforcements, play nice."
  • "So...we left a note saying we're leaving, right?"
  • "Well, it'll be pretty obvious if he succeeds."
  • "Aye sir. Crazy mystery trip to Arcadia plotted in, spinning up FTL drive."
  • "Threading a needle while accelerating around an exploding star inside a planet that's falling apart? Sure, why not?"
  • " I the only one freaked out by the fact that we're inside the planet?"
  • "Closing your eyes might help, too."
  • "Captain, wake up. Something has happened."


  • Serina has an apparent theoretical interest in chocolate, according to the Halo Wars Instruction Manual.
  • "Spinning up FTL drive" may be a reference to the re-imagined Battlestar Galactica, which uses this phrase frequently when the Fleet jumps.
  • Serina, knowing the crew of the Spirit of Fire may be on a one-way trip, manufactured and delivered fake emails from family members to the crew celebrating Valentine's Day. No one ever suspected her of this deception.[6]
  • She has a very sarcastic and detached nature. She frequently seems to disregard the lives of others, even her own ship's crew - such as when the Spirit of Fire is slowly being pulled inside the Shield World - almost always responding to their peril with some curious remark or dark joke.
  • She was voiced by Courtenay Taylor.
  • Her name "Serina" means "Serene", or "Calm". This is a reflection of her personality which can be described as cold or uncaring even when she and her ship are in danger.
  • Serina's only human memory is "kissing a boy".
  • After completing the game on Legendary, Serina will say "Captain, wake up; something has happened." After that, she will repeat that quote if the last level is completed.


List of appearancesEdit


  1. 1.0 1.1 1.2
  2. Halo Wars: Genesis: "Spirit's 'smart' AI, Serina, can coordinate the simultaneous repair and refit of 12 ships of the line. We couldn't get along without her."
  3. Halo Wars Timeline
  4. Halo Wars Manual
  5. - Halo Wars Cinematic Part 2
  6. Halo Wars: Halo Timeline
Known UNSC AIs
AineAraquielAuntie DotBlack BoxBeowulfCaptain TeachChaunceyCortanaDeep Winter
DopplerDurgaDéjàEndless SummerEternal SpringFitzGibbonIonaJerrodJulianaKalmiya
LacklusterLokiLoreleiLysitheaMackMamaMelissaMo YePallas AthenaPhoenix
RebeccaRolandSekmetSerinaSifSolipsilSuperintendent (Vergil) • ToranWatchmakerWellsley

Start a Discussion Discussions about Serina

  • serina

    • With Serina being an AI, and AI's only lasting and average of 7 years, she was would have gone rampart around 6 years after the Spirit of Fi...
  • Serina

    3 messages
    • I honestly don't believe she says that at any point.
    • in the booklet most like. not sure though
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