Cortana is a fictional artificially intelligent (AI) character in Bungie Studios' Halo series of video games. Voiced by Jen Taylor, she appears in Halo: Combat Evolved and its sequels, Halo 2 and Halo 3, as well the novels Halo: The Flood, Halo: The Fall of Reach, Halo: First Strike, and Halo: Ghosts of Onyx. During gameplay, Cortana provides backstory and tactical information to the player, who assumes the role of the Master Chief. In the story, she is instrumental in preventing the activation of the Halo installations, which would have destroyed all sentient life in the galaxy-wikiCortana Papercraft
