Cortana is a smart artificial intelligence construct. She was one of the most important figures in the Human-Covenant war and was also the partner of John-117 in many combat missions accompanying him in many of the final battles of the war. Data Crystal Chip is a form of file storage device used by the UNSC. It is used for transferring hard data, AI data, navigation data, weapon technological charts, etc. Game cursor with Halo Cortana and Data Crystal Chip.