Rebecca

Rebecca is the A.I. of the UNSC Red Horse.

Background
Rebecca is commissioned by the Office of Naval Intelligence to monitor the Red Horse during a top-secret mission around the ruins of Installation 04. She replaced the Red Horse's former shipboard AI, Chauncey.

Appearance
She is the only known A.I. to have two appearances. Her first appearance is described as "half-Athena, half-Ares" with a feathered Greek headdress and ancient armor. She then changed her appearance to a flabby, middle-aged Mediterranean woman in a flower dress.