Editing O'Brien (Heian)

{{Status|Canon}}
{{Center|This article is about the ODST sharpshooter who participated in [[Operation: GREY VEIL]]. For the ODST who participated in the Battle of Mombasa, see [[O'Brien (Mombasa)]]. For the Marine who fought in Fall of Reach, see [[O'Brien (Reach)]].}}
{{Character infobox
|variant=Human
|name=O'Brien
|image=[[File:Legends ODST OBrien.png|x300px]]
|homeworld=
|birth=
|death=
|causeofdeath=
|parents=
|siblings=
|spouses=
|children=
|species=[[Human]]
|gender=Male{{Ref/Reuse|Baby}}
|height={{Convert|177.8|cm|ftin|sp=us}}{{Ref/Site|URL=http://forums.bungie.org/halo/archive32.pl?read=949883|Site=HBO Forums|Page=Re: Personal Review of The Babysitter|D=30|M=5|Y=2021}}
|mass=
|hair=Red{{Ref/Reuse|Baby}}
|eyes=Blue{{Ref/Reuse|Baby}}
|affiliation=[[United Nations Space Command|UNSC]] [[UNSC Marine Corps|Marine Corps]]
*[[Orbital Drop Shock Troopers]]
|rank=
|sn=
|notable=
}}
{{Quote|I don't miss! I never miss!|O'Brien}}
'''O'Brien''' is a [[sniper]] and an [[Orbital Drop Shock Trooper]] in the [[105th Shock Troops Division]] who participated in the [[Human-Covenant War]].{{Ref/Film|Id=Baby|HLeg|Story=The Babysitter}} In [[2544]],{{Ref/Site|Id=CFShocks|URL=https://www.halowaypoint.com/news/canon-fodder-system-shocks|Site=Halo Waypoint|Page=Canon Fodder - System Shocks|D=30|M=06|Y=2023}} he was assigned to a squad led by [[Master Sergeant]] [[Cortez]] as a part of the Marine contingent aboard the [[UNSC destroyer|destroyer]] {{UNSCShip|Kronstadt}}.{{Ref/Reuse|Baby}}

==Biography==
===Assassination mission===
{{Main|Operation: GREY VEIL}}
[[File:Legends marine.png|200px|thumb|left|O'Brien in casual fatigues before deploying to the planet.]]
In [[2544]],{{Ref/Reuse|CFShocks}} O'Brien and a team of fellow [[ODST]]s were charged with assassinating a [[Unidentified Prophet (Heian)|Prophet]] who was overseeing Covenant logistic operations on [[Heian]]. O'Brien was to serve as the backup sniper in the mission. He felt this was an insult to his abilities and was even more shocked to learn that a [[SPARTAN-II Program|Spartan-II]], [[Cal-141]], was the mission's primary sniper.{{Ref/Reuse|Baby}}

The squad was deployed to the planet using the cover of a meteor shower. Upon landing, O'Brien's [[M8900 drop pod|M8900 SOEIV]] crashed into a cliff and fell into a swamp. The fall damaged the oxygen tank and the pod began to sink.{{Ref/Reuse|Baby}}

Cortez and [[Taylor Miles|Dutch]] hurried to save O'Brien but stopped short due to the thick mud in the swamp. The Spartan calmly walked to the pod, and with some effort, lifted the pod and tossed it out of the swamp. She then pried the door loose to let O'Brien exit. The ODST was shocked by the sudden action and was disheartened by the loss of his squadmate [[Checkman]], who had died during atmospheric entry. Along the way, he frequently needled Cal, showing his contempt for the SPARTAN despite the fact that, without Cal's help, he would have drowned in his pod.{{Ref/Reuse|Baby}}

During the operation, he was attacked by a [[Jiralhanae]] [[Unidentified Jiralhanae chieftain (Heian)|chieftain]] wielding a [[Gravity hammer (fiction)|gravity hammer]] while attempting to kill an [[Unggoy]] he had alerted. However, before the chieftain's gravity hammer struck O'Brien, Cal caught it in her hand. However, O'Brien was swept aside and rolled down an embankment, losing both his weapons in the fall. Fortunately, O'Brien managed to grab a root that hung precariously over a waterfall. From this position, he watched the Spartan battle the Brute, which she ultimately kicked off the waterfall after gouging out its right eye.{{Ref/Reuse|Baby}}

Cal saved O'Brien again when she pulled him away from the waterfall. However, he seemed unappreciative as he yelled at her to put him down, and then snapped at Dutch, who told him to quiet down before alerting more Covenant patrols. His anger and contempt toward Cal grew more intense when Dutch reminded him that Cal had saved his life twice already and that he should have thanked the Spartan.{{Ref/Reuse|Baby}}

The group eventually arrived at the sniping position just as the Prophet's dropship was touching down. While the Spartan was preparing her sniper rifle to make the shot, the Brute chieftain ambushed the team. Before O'Brien could be struck unaware from behind, Cal saved him, taking the blow from the chieftain's gravity hammer.{{Ref/Reuse|Baby}}

The ODSTs tackled the chieftain to the ground and Dutch shot the Brute in the face with his [[M7S Caseless Submachine Gun|SMG]]. As Cortez removed Cal's helmet to assess the extent of the SPARTAN's injuries, O'Brien was shocked to discover that Cal was female. Cal, realizing that she could no longer function as a sniper due to extent of her injuries, yelled to O'Brien to take the shot. At first he hesitated, but he took up the sniper rifle and killed the Prophet.{{Ref/Reuse|Baby}}

O'Brien and the team remained with Cal until her death. Back on the destroyer, O'Brien remained silent, not saying a word even when the rest of the squad angrily scolded [[Berger]] for mocking Cal's abilities in battle. He thought deeply about how Cal had continuously saved his life.{{Ref/Reuse|Baby}}

===Legacy===
By [[2559]], records of O'Brien's mission on Heian had reached [[Installation 00|the Ark]], outside of the [[Milky Way]] galaxy. The details of the sniper shot were studied by the crew of {{UNSCShip|Spirit of Fire}}, with [[Lance Corporal]] [[Devon Sparks]] of [[Sunray 1-1]] learning from the mission to conduct a similar assassination of a [[Jiralhanae]] [[Captain (Covenant)|Captain]] of the [[Banished]] in the [[Second Ark Conflict]].{{Ref/Site|Id=CF100|URL=https://www.halowaypoint.com/en-us/news/sweet-centennial|Site=Halo Waypoint|Page=Canon Fodder - Sweet Centennial|D=24|M=09|Y=2021}}

==Trivia==
O'Brien was voiced by Blake Shepard.{{Ref/Film|HLeg|StoryzThe Babysitter|Detail=[[Halo Legends credits|credits]]}}

==Gallery==
<gallery>
File:TheBabysitter OBrianHelmet Concept.png|Concept sketch of O'Brien.
File:TheBabysitter OBrianFace Concept 2.png|Concept sketch of O'Brien.
File:TheBabysitter OBrian Concept.png|Concept art of O'Brien.
File:TheBabysitter OBrianFace Concept.png|Concept art of O'Brien.
File:Cortez squad.jpg|From left, Dutch, O'Brien and Checkman getting debriefed by their commanding officer, [[Cortez]].
File:Hleg TheBabysitter SquadAtRest.png|O'Brien and the surviving members on Heian.
File:HLeg CalholdsObrien.png|O'Brien gets held and assisted by Cal.
File:HLeg O'BrienSnipe.png|O'Brien lines up his shot on the Prophet.
</gallery>

==List of appearances==
*''[[Halo Legends]]''
**''[[The Babysitter]]'' {{1st}}
*''[[Halo Infinite]]''
**''[[Season 04: Infection]]'' {{Im}}

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

[[Category:Orbital Drop Shock Troopers]]
[[Category:Human characters]]