Yomi is a vicious monarch who conspires to rule over the world. He is a distant descendant of Babel and has supernatural power equivalent to that of Babel II. He owns secret bases across the world and is accompanied by miscellaneous subordinates, including scientists, engineers, psychics, and cyborg agents.

Because Yomi sends remodeled men to each country as VIPs in the government, he can manipulate many nations at will. He produces various robot weapons to counter Babel II's three servants and challenges him to a fight. He had been invited to the Tower of Babel as a candidate for heir-apparent of the tower before. However, since the computer judged that he did not suit as successor, this memory was erased from him. Yomi is known to command combat robots called Baran that use iron ball-and-chain maces as weapons.