Toji Sakakibara (榊原 藤次, Sakakibara Tōji, 32-33): Toji is Hiro's grandfather. As a result of the deaths of his son and daughter-in-law in a landslide to which he believes is the fault of the Ushi Origami, he has produced a Secret Disk that is designed to destroy the Ushi Origami. He feels guilty because he inspired his son to attempt to make a Secret Disk to control the Ushi Origami.
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