Doctor Greene is a normal, everyday doctor from Atlanta, Georgia. Considered one of the best in the business, Doctor Greene has performed nearly every single surgery known to man, including Brain Surgery. He is a highly intelligent individual with a sharp wit and a desire to not let people die. He is cool under pressure and is renown for his speed in completing successful surgeries.
Doctor Greene started working with G.U.A.R.D. in 1990 as a result of looking for more challenges in his career and life; as such, GUARD has not let him down.
His only issue is the fact that he considers himself a ladies man. At the age of 55, the doctor sees his youth fading, but not his youthfulness.