Shortly after on Forerunner world Genesis, the new Warden Eternal considered she was able to uphold new Mantle regarding Obligations, and vowed to protect and you may serve less than this lady, giving the girl complete procedure of one’s solutions towards the secure world toward package one to she got planned.
This new Warden Eternal is concerned with this lady addiction to John-117, caution the woman which he manage try to prevent what she had planned, however, she ignored his anxieties, believing that he’d never ever would something
Months afterwards Cortana become reawakening the brand new Predecessor constructs known as the Guardians, resulting in planetary catastrophes. Not having people leads on these incidents, the UNSC did not know how to work, up to Dr. Catherine Halsey contacted Master Lasky, providing your the lady venue and you can claiming she understood that was supposed for the to your nest worlds. Three months after, Fireteam Osiris try deployed on the planet Kamchatka in order to phase a cut operation, and was eventually profitable. 
Whenever you are Fireteam Osiris are saving Dr. Halsey, John-117 is contacted from the Cortana for the Raid on UNSC Argent Moonlight. Bluish Group do pursue Cortana into Nest field of Meridian.  Cortana hit a take on Meridian’s governor, a partial-rampant AI called Sloan – the folks off Meridian would-be given the possibility to evacuate, and you will Sloan himself considering entry to brand new Domain name additionally the eliminate to have rampancy, in return for making it possible for Blue Class unfettered entry to the newest mine in the Apogee Station as well as the Guardian housed therein. Regardless of the attempted input regarding Fireteam Osiris, Cortana been able to utilize the Meridian Guardian to take John-117 while the rest of Blue Group to help you Genesis, where she revealed her visible way to rampancy and her bundle to use christianmingle the latest Guardians so you’re able to demand a purple Serenity and you will embrace brand new Mantle from Obligation into Composed.
Fireteam Osiris, convinced that the new Guardians you can expect to make them John-117 and Cortana, were in the near future advised away from a sedentary Protector with the Sanghelios, saving Thel ‘Vadam from an assassination decide to try. Thel ‘Vadam discovered out-of Locke’s intent to get John-117, where Cortana interrupted and stated that they will never see her or him. Aware of brand new Guardian lying on the planet, Fireteam Osiris were able to and get a great Constructor that stalled the brand new Guardian for enough time so you’re able to panel they, in spite of the Warden Eternal intervening once again.
Learning from Cortana’s arrangements, John-117 accepted one to she had to be averted, however, expected he will be capable reasoning together with her. Cortana are frustrated by Warden’s ongoing tries to harm John, in the course of time banishing your temporarily down to their procedures. She then manifested by herself to see John again, who made an effort to persuade the woman to quit. Cortana is actually disappointed, but just thinking him to-be misguided, regarding Cryptum having 10 thousand years to show him the woman work after she try complete.
However, Locke were able to ruin the last exchange, enabling 031 Lush Experience in order to win back power over Genesis’ options. Inside an act away from payback to own Cortana bringing the woman construction away, Lush Experience took the fresh Cryptum property John-117 and you may Blue Team, far so you can Cortana’s nightmare as their Protector ran to the slipspace.
Watching Fireteam Osiris chronic toward freeing John-117, Cortana taunted the team and you will sent Prometheans to stop her or him
Embittered by loss of John-117, Cortana began their Reclamation, and you can managed to discover the UNSC Infinity. Yet not, it did an urgent situation slipspace dive in advance of this lady Protector you will definitely disable it.
During their target to the species of the brand new market, the latest Unggoy away from Bahalo made a decision to get in on the Authored. Watching which, Cortana sent vessels full of cutting-edge technical, agricultural support programs, food, medicine and defense with the entire world.