Cortana will be in physical form in Halo 5, created in a similar way as the Prometheans - her blue AI appearance housed in armor. Retractable helmet/visor for cutscenes. The Librarian, infusion with the Didact ship controlling the Composer, led to Cortana being able to save herself for physical creation. She will be used in the campaign as a partner, with different abilities. In two-player co-op, one player assumes the role of Cortana to use her abilities for progression; the other player uses Chief's.
I'm pulling all of this out of my ass.
I'm pulling all of this out of my ass.