Koichi Yamano (his family name differs depending on the anime version, including Furumi and Kamiya), also known as "Babel II", 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 powerful servants following him; with their help, he confronts Yomi for disturbing the world's peace.
In the Giant Robo: Chikyuu ga Seishi Suru Hi OVA and manga series, Koichi is known as "Big Fire", the unquestioned leader of the organization of the same name. All of the Magnificent Ten serve him along with his three powerful servants, the shapeshifter Rodem/Achilles, the supersonic pterodactyl robot Ropross/Garuda, and the giant humanoid robot Poseidon/Neptune. Big Fire is highly mysterious, and we only get brief glimpses of him in the last few episodes of the OVA. He appears as a boy with silver hair and his powers are unknown, but they are suspected to be enormous.
yamano kouichi
Characters
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Ginrei
Main
The daughter of Franken von Fogler, who was thought to have died at the tragedy of Bashtarle. She managed to escape the tragedy along with one of the assistants to the five scientists developing the new power source by means her ability to teleport. Howev...
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Kusama Daisaku
Main
The 12-year-old boy who happens to own the wristwatch that controls the worlds most powerful robot! However, this is hardly fun and games. Robos power is a huge responsibility. Daisaku feels that he should use Robo to help the world, as his father wanted ...
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Alberto
Supporting
One of the Magnificent Ten of Big Fire. He is continually bridled by having to report directly to Genya on the current project. He does not trust how he is watched by Ko-Enshaku or Genyas methods. He himself, however, is blinded by his own hate for Taisou...
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Chuujou Shizuo
Supporting
The leader of the IPO and the Experts of Justice. Possesses an incredibly devastating power that puts him above possibly all of the other Experts. Because of the huge danger it poses to himself and others, he is adamantly entreated to abstain from using a...
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Gakujin Go
Supporting
Previously an assistant along with Genya to the five scientists at Bashtarlle, he is one of the few survivors of the tragedy and was left to believe that both Genya and Dr. Franken von Fogler died when the experiment went wrong. The memory of that tragedy...
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Genya
Supporting
The brother of Ginrei, the son of Franken von Fogler. He was an assistant along with Go Gakujin at Bashtarle. Originally believed to have died along with his father at the tragedy he shows up later as a tool of Big Fire. Consumed with a desire for revenge...
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Murasame Kenji
Supporting
He has a rather special power and in some ways is supposed to be able to rival Chujo. The basis for his power, however is not offensive. Kenji is immortal. He can not die. His power is his curse. His friends and those he cares for die. He is forced to kee...
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