. . . . . . . . . . "Cortana Letters" . . . . "Cortana (Halo)" . "Halo: The Fall of Reach (2001)" . . . . "Cortana from ''Halo''" . . . "a character of the science fiction franchise \\\"Halo\\\"" . . . "Cortana (Halo)#Promotion" . . . . . . . . . . "Cortana (Halo)" . . . "artificial intelligence character" . "Cortana (''Halo'')" . "Cortana" . . . . . . .