CTN 0452-9 Cortana

Cortana (UNSC Artificial Intelligence serial number: CTN 0452-9) is a UNSC "smart" AI. She was one of the most important figures in the Human-Covenant War, and served as John-117's partner in various combat missions, as well as serving as the AI for the United Nations Space Command Halcyon-class Cruiser Pillar of Autumn, the Orbital Defense Platform Cairo Station and the UNSC frigate In Amber Clad. In addition, she held vital data pertaining to the Halos, including the Activation Index from Installation 04.

Halopedia