Name: unnamed nurse
First Appearance: Action Comics (vol. 1) #19 (Dec. 1939): "Superman and the Purple Plague"
Number of Appearances: 1
Enemy of: Superman
Worked for: The Ultra-Humanite
An unnamed woman, who was dressed as a nurse but may have simply been a criminal dressed as a nurse, accompanied a disguised Ultra-Humanite to the library so he could read De Fauvier's rare volume about the Purple Plague of the Middle Ages. The nurse was well aware that the Ultra-Humanite was really a villain bent on world domination.
In the librarian the disguised Ultra-Humanite turned the De Fauvier book back into the librarian, saying, "Here you are . . . Very interesting . . . Yes, very interesting, indeed!"
The nurse pushing the disguised Ultra-Humanite in his wheelchair said, "I've told him not to strain his eyes too much. But he refuses to listen to me!"
Later, in "a darkened sedan, the old man slips off a false-face mask . . ."
The Ultra-Humanite said, "That young scientist -- Henry Travers -- has been showing too much interest in that volume. We'll have to do something about that, eh?"
The nurse obediently replied, "Yes, Ultra . . . You will!"
The nurse was only seen in panels 4 and 6 of page 3 of the Superman story in Action Comics #19 (Dec. 1939). Little was ever reavealed about this unnamed nurse, but from her actions and dialogue it was clear that she was totally loyal to the Ultra-Humanite and at least somewhat aware of his evil plans to destroy most of humanity with a plague. The nurse no doubt believed that she would be among the chosen few who the Ultra-Humanite would allow to survive in order to begin the human race anew under his guidance. Perhaps the nurse, who seems like a true believer in the Ultra-Humanite, had some ideological reason for wanting to go along with all this, and was not simply doing this for greed and selfish self-enrichment.
In panel 4 of page 7 the Ultra-Humanite outline his plan while steadfastly refusing to give up despite Superman being on the case: "No freak of nature will stop me from achieving my goal! The human race shall be blotted out so that I can launch a race of my own -- and no one -- nothing -- shall prevent it!"
The details of the nurse's motivations are never made explicitly clear, but based on this story it seems that she was an ideological supporter of the Ultra-Humanite's stated cause.