Immediately following into Precursor entire world Genesis, the fresh new Warden Endless felt she managed to uphold the new Mantle of Obligations, and you will vowed to guard and serve less than their, providing the lady complete process of the options with the secure globe for the package you to she had at heart.
The fresh Warden Eternal was concerned about her obsession with John-117, caution the girl he manage attempt to end exactly what she had in your mind, but she disregarded his concerns, convinced that he would never ever carry out something
Weeks later Cortana already been reawakening the latest Precursor constructs referred to as Guardians, ultimately causing planetary disasters. Devoid of people prospects during these events, this new UNSC did not can respond, up until Dr. Catherine Halsey contacted Master Lasky, giving him this lady place and you may stating she realized what was heading into towards nest planets. Three days after, Fireteam Osiris is actually deployed on earth Kamchatka in order to stage a great rescue procedure, and is fundamentally successful. 
If you find yourself Fireteam Osiris is actually protecting Dr. Halsey, John-117 is contacted because of the Cortana when you look at the Raid to the UNSC Argent Moon. Blue Cluster carry out chase Cortana into Nest world of Meridian.  Cortana achieved an accept Meridian’s governor, a partial-rampant AI entitled Sloan – individuals out-of Meridian could well be considering the possible opportunity to evacuate, and you may Sloan himself offered access to the fresh Website name in addition to eradicate to own rampancy, in exchange for making it possible for Blue Party unfettered access to new exploit during the Apogee Route and also the Guardian housed therein. In spite of the attempted intervention away from Fireteam Osiris, Cortana were able to make use of the Meridian Protector to create John-117 as well as the rest of Bluish Group to help you Genesis, in which she found their obvious answer to rampancy and her plan to use the brand new Guardians to help you impose an imperial Serenity and you may follow the Mantle out-of Obligation with the Composed.
Fireteam Osiris, believing that new Guardians you can expect to cause them to John-117 and Cortana, had been in the near future told out of an inactive Protector towards the Sanghelios, preserving Thel ‚Vadam regarding an assassination decide to try. Thel ‚Vadam discovered from Locke’s intention locate John-117, upon which Cortana interrupted and reported that they will never select them. Conscious of the fresh new Guardian sleeping on the planet, Fireteam Osiris were able to acquire a beneficial Constructor one to stalled new Guardian for enough time so you can panel they, in spite of the Warden Endless intervening again.
Discovering of Cortana’s arrangements, John-117 approved you to definitely she must be stopped, but hoped he would-be in a position to need together with her. Cortana is irritated of the Warden’s ongoing tries to damage John, sooner banishing your briefly as a result of his methods. She upcoming manifested herself observe John once more, who tried to persuade the woman to get rid of. Cortana try distressed, but simply believing your to-be mistaken, from the Cryptum for ten thousand age to show him the girl performs immediately following she is actually over.
However, Locke was able to damage the final exchange, enabling 031 Exuberant Experience in order to win back power over Genesis’ possibilities. From inside the an act out of revenge having Cortana taking her set up out, Lush Witness got this new Cryptum homes John-117 and you will Bluish Class, much so you’re able to Cortana’s horror as their Protector went to your slipspace.
Enjoying Fireteam Osiris persistent towards releasing John-117, Cortana taunted the group and you can sent Prometheans to eliminate them
Embittered by the loss of John-117, Cortana began amolatina this lady Reclamation, and you may managed to select the UNSC Infinity. not, it performed an urgent situation slipspace dive prior to her Protector could disable it.
Throughout the this lady target with the species of the brand new universe, brand new Unggoy off Bahalo chose to get in on the Composed. Enjoying so it, Cortana delivered vessels packed with complex technology, agricultural service programs, restaurants, treatments and security to your globe.