The Dydex and Cortana

Halo 5, I skipped it a little bit. It was just Master Chief going off kind of with AWOL to find Cortana. He kept hearing her voice even though he knew she'd be dead,. And so he went off to go find her and went against orders to do it, which is very unmastered chief thing to do. Sounds like a little bit of psychosis. Yeah. The forerunners to help him be immune the librarian that woman, the Dydex wife in Halo 4 explained that being the librarian incapable of manipulating DNA, she has manipulated human DNA to lead to the outcome of a Master Chief being created and Cortana as well. She made him change DNA wise enough