Masaharu Sekiguchi

Ultraman Zearth hails from The Land of Pikari in Nebula Z95. He has a big red face and dislikes dirt, and will go to great lengths to wash it off his hands. His goal is to clean the polluted Earth. He transforms with an electric toothbrush, which is consistent with his hygiene fixation. He's not quite adept at being a superhero, but at least he tries his best.

Not long after, Benzene’s wife, Lady Benzene arrived to try her luck. Sending her evil Ultraman Shadow to attack the hero, he was ambushed in Antarctica, easily being pummeled and being given a bloodshot eye. Finally, he was struck by the Shadolium Beam, which due to his fear, overwhelmed his own, knocking him out. The battle left Zearth emotionally crushed and unable to fight due to complete terror of Shadow. But, after receiving a message from his father, as well as a capsule monster named Miraclon, Zearth decided to train and become powerful enough to face the evil android.