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

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

Catherine Halsey - Character - Halopedia, the Halo wiki

Olivia-G291 - Character - Halopedia, the Halo wiki

Mark-G313 - Character - Halopedia, the Halo wiki

James Ackerson - 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

Kelly-087 - Character - Halopedia, the Halo wiki

Cortana - Character - Halopedia, the Halo wiki

Catherine Halsey - Character - Halopedia, the Halo wiki

Catherine Halsey, Halo Alpha