Developed by the United Nations Space Command (UNSC), Cortana is a smart A.I. with the ability to project herself as a holographic image and be transferred between computer systems, including the cybernetic armor of Master Chief.

This figure's base features an LED light that illuminates her 4.5 inch-tall figure.
 

Figure stands 4½ inches high on 4 1/8-inch diameter by 7/8-inch tall light-up base.