Duncan Pramble was a scientist's assistant who accompanied his employer and the Challengers of the Unknown to an exotic island in order to obtain the famed "liquid light". Locating it with a map before the rest, Pramble ingested the ancient elixir and gained the ability the transform his body. He battled the Challengers of the Unknown and was a member of the League of Challenger Haters. After a series a defeats alongside these villains, including his frequent robotic ally Multi-Woman, Multi-Man eventually changed his tactics which attracted the attention of Wonder Woman. She likewise defeated him decisively.
Thomas Morito was a Nisei, an American born man of Japanese heritage, whose family was oppressed during to early days of World War II. To avenge this injustice, he trained to be a samurai and gained the ability of shape-changing, battling the All-Star Squadron. Eventually, he joined other powerful Japanese agents of the Axis Powers in order to attack the Squadron. When he still met with failure, he decided to operate more covertly which attracted the attention of Wonder Woman. During this battle, Kung perished while saving his sister who had opposed him.