Originally Posted by RBmaster9345
This is my theory mentioned in a nutshell. The Composer's function was a slip space alternative. Convert into data at one, then convert back from another across the galaxy. So solid to data then back again. The question I proposed was what if Cortana (data) had used it on herself to gain a physical form. That would also likely solve her rampancy.
Would be cool if she came back like you say, Halo 5 coop, second player can play as her :P