This would go on to cause many problems for both the Sangheili and the UNSC, who were busy shutting down other major threats, such as the rogue AI Cortana ... the Halo rings and Forerunner ...

The artifact that Miranda Keyes and Dr. Halsey retrieved from the dead Forerunner scientist ... the Forerunners designed this AI to be the caretaker of the Halo. John pleads his case with it ...