Yamano, Kouichi

山野浩一 / 古見浩一 / 神谷浩一 / バビル2世 / ビッグ・ファイア / 101

Koichi Yamano (his surname varies across anime adaptations, appearing as Furumi or Kamiya), also known as "Babel II", leads a typical junior high school life until the Tower of Babel's computer designates him as its master. Koichi is actually a distant descendant of the space alien Babel, who was stranded on Earth 5000 years ago and deceived humanity into constructing the legendary tower to signal his landing location to his friends. However, a malfunction in one of the tower's computers caused an explosion that destroyed the entire structure. Koichi inherits Babel's superhuman intellect, physical strength, and various other supernatural powers. He departs from the Tower of Babel accompanied by three powerful servants; with their assistance, he confronts Yomi for disrupting world peace.
In the Giant Robo: Chikyuu ga Seishi Suru Hi OVA and manga series, Koichi is known as "Big Fire", the undisputed leader of the organization bearing the same name. All members 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 viewers only catch brief glimpses of him in the final episodes of the OVA. He appears as a boy with silver hair, and while his powers are unknown, they are suspected to be enormous.