This article contains information of dubious canonicity. While not officially established as fully non-canonical, certain aspects of the subject may not be part of the official Halo canon.
Kay was a doctor and the superior of Lulu Hershey, who would later become a nurse on the UNSC Spirit of Fire. Hershey described him as cruel and vindictive, liking to make her life a living hell. His professional record is strongly suspect, as he had sexual relations with two of his employees, Brooke and Vasquez.