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

Cortana - Character - Halopedia, the Halo wiki

Character Profile: Dr. Catherine Halsey (Halo) – Eggplante!

Catherine Halsey - Character - Halopedia, the Halo wiki

Catherine Halsey - Character - Halopedia, the Halo wiki

Catherine Halsey, Halo Alpha

Holly Tanaka - Character - Halopedia, the Halo wiki

Jiralhanae, Halo Alpha

The complete Halo timeline - Polygon

Catherine Halsey - Character - Halopedia, the Halo wiki

Catherine Halsey - Character - Halopedia, the Halo wiki

Catherine Halsey - Character - Halopedia, the Halo wiki

Catherine Halsey - Character - Halopedia, the Halo wiki

Dr. Catherine Halsey's Computer - Halopedia, the Halo wiki