Kinga is a giant gorilla, who was formerly a monkey owned by Dr. Peters.
After Radioactive Man defeated Roargo, Dr. Peters and Ginnie went to him for help once more because their monkey, Kinga, had been exposed to radiation and turned into a giant gorilla that was destroying Zenith City. Radioactive Man went to the Rubber Factory to get enough rubber to make a giant gorilla costume himself to pose as Kinga's mother.
Behind the Laughter
Kinga is a parody of King Kong.