Julius Preterius (formerly)
Dr. Gray was a colleague of Julius Preterius in his cat experiments.
Gray was a dark-skinned man with dark eyes. His facial features are hidden behind a surgical mask. He had black hair and appeared to be African-American.
Gray is loyal to Dr Preterius and he is good friends with Ziebold.
He worked alongisde Ziebold as well and presumably left alongside him when the project began to lose funding and looked more and more like a failure. His ultimate fate is unknown.