Characters ;Babel II :The main character's real name is Koichi Yamano. (His family name differs by version, including
Furumi,
Yamano, and
Kamiya.) Koichi lives an ordinary
junior high schooler's life, until one day when the computer of
the Tower of Babel authorizes him as a master of the tower. Koichi is actually a distant descendant of the space alien Babel, who was cast ashore on Earth 5000 years ago and who tricked the people of Earth into building the legendary tower to signal to his friends where he had landed, only for one of the tower's computers to malfunction and explode, destroying the entire structure. Koichi inherits Babel's superhuman intellect, physical strength and other various
supernatural powers. He leaves the Tower of Babel with three servants following him; with their help, he confronts Yomi for disturbing the world's peace. ;Yomi :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. ;Yumiko Furumi :Yumiko is a daughter of Dr. Furumi and a classmate in Koichi's junior high school. In the anime version (1973), she is Koichi's cousin, and since Koichi lost his parents when he was young, Dr. Furumi took him in. ;Igarashi :Igarashi is a head of the National Security Bureau and a supporter of Babel II. ;Igano :Igano is a skilled investigator for the National Security Bureau.
Three servants ;Rodem :Rodem is an intelligent living being of indeterminate form. It can transform itself into various forms, but prefers a black panther's figure. It also often chooses a female figure. ;Ropross :Ropross is a huge robot in the form of a pterodactyl. It can fly in the sky at supersonic speed and has a
rocket launcher and the Supersonic Wave Generator in its mouth. ;Poseidon :Poseidon is a giant humanoid robot. It has a
laser gun in one finger and a
torpedo launcher in its abdomen. Poseidon shows its abilities most in the sea, but it can be active and powerful on the land as well. ==
Sono Na wa 101 (manga)==