Red Ronin was developed with the assistance of Stark International by Japanese engineers and scientists Tamara Hashioka and Yuriko Takiguchi. It was intended to be used by S.H.I.E.L.D. against the monster Godzilla. Before it could be utilized for this purpose, the robot was stolen by Takiguchi's twelve year old grandson Rob. Originally referred to as SJ3RX, the robot was named Red Ronin by the youngster.
After an initial attempt to control the robot failed, Rob succeeded in piloting Red Ronin into battle with Godzilla, in an attempt to drive the beast off. Rob wished to prevent the radioactive creature from being harmed and his attempts to ward the monster off were designed to actually preserve his life. He succeeded in doing so and it was discovered that Ronin had been imprinted with Rob's brain patterns, making the robot useless without him to pilot it.
