ok guess halo5follower here to show u my theory on halo5 . ok so here it goes. master cheif goes to reach to bring back cortana. the bird tells him that he can bring her back as a transgender, which ultimately shows dere reasoning for saying its not a girl.den they say it's a new character because she takes on new form. the evidence is the visor-obvisly. blue stands for cortana and that's it please follow my pyramid scheme and don't forget to follow me have a good night see you