Catherine Halsey - Character - Halopedia, the Halo wiki

Doctor Catherine Elizabeth Halsey,, is a key scientific adviser of the Office of Naval Intelligence, best known for her work with the SPARTAN-II program, developing and creating smart AIs such as Cortana, and for overseeing the

Catherine Halsey - Character - Halopedia, the Halo wiki

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Halo: Ghosts of Onyx - Wikipedia

Catherine Halsey - Character - Halopedia, the Halo wiki

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Catherine Halsey, Halo Alpha