A fiendish "mad scientist" (Act No. 17, Oct 1939), hopelessly paralyzed from the waist down and confined to a wheelchair, whose "great goal" is the "domination of the Earth" (Act No. 14, Jul 1939; and others). Portrayed as nearly bald in two texts (Act No. 13, Jun 1939; Act No. 19, Dec 1939), and as completely bald in two others (Act No. 14, Jul 1939; Act No. 17, Oct 1939), he is a "mental giant" -- the "head of a vast ring of evil enterprises" -- whose fiery eyes burn with terrible hatred and sinister intelligence.
His real name is never stated in the chronicles, but he has been known as the Ultra-Humanite -- Ultra, for short -- ever since "a scientific experiment resulted in [his] possessing the most agile and learned brain on Earth!"
"--Unfortunately for mankind," proclaims the villain in June 1939, "I prefer to use this great intellect for crime. My goal? DOMINATION OF THE WORLD!!" (Act No. 13)