Alien Atlanta crashed a stolen rocket, whose occupant he'd taken the form of Saburo Uchida, the rocket's owner—into the Earth, pretending to be in mortal danger to get MAC's sympathy and help. However, he ran into a slight problem when those who knew the real man arrived, forcing him to remain quiet, as he didn’t fully know the man he was replicating. He met Gen and shook his hand, sensing the man’s true identity as Ultraman Leo, but Gen also sensed that he wasn't truly the man he was pretending to be.

While being allowed to use a MAC aircraft, he used his disable beams to bring down Gen’s plane, attempting to discredit him while stopping him from crashing to earn their trust further, but MAC defended their own. Atlanta continued to live the life of the man whose form he’d taken, including preparing to marry his disguise’s lover.