Margaret, played by Margo Johns, is a character in the 1961 film Konga.
Margaret is the assistant and lover of Dr. Charles Decker. When he discovers a serum that turns his chimpanzee subject into a ferocious gorilla-sized ape, he loses his mind. However, shen she notices Dr. Decker's affection for Sandra Banks, she attempts to get even by giving Konga an enormous amount of the strange serum and turns him into an enormous monster, although she becomes his first victim.