Dr. Fear

Golden Age Origin
I.M. Fear was a doctor working at West Coast Hospital, who performed experiments in his laboratory late at night. He developed a gas that caused men to go mad with fear, to the point that they would do irrational things such as leaping out of windows for no reason, or revealing their most guarded secrets. He shot the gas out of a flower he wore on his lapelle. Dr. Fear was a shintoist loyal to Japan, the land of his forefathers. He planned to use his gas to help him steal plans and information vital to the defense of the Western United States during World War II. He was eventually defeated by Minute Man.

Golden Age Appearances
Master Comics #29