Koichi:
Koichi, age 17, grew up at an orphanage. Troubled by strange nightmares, he is awakened as Babel II, the legitimate successor of the blood and heritage of the alien, Babel I.
Yomi:
Yomi is the merchant of death and the emperor of darkness with outstanding psychic power. He owns a huge conglomerate of major industrial and military products networked over many countries. His ambition is to be ruler of all mankind and the earth.
Reika:
A young and beautiful agent of UNIT, United Nations Intelligent Team. Her job is to search and subdue international conflicts, conspiracy and domestic riots before they flare up.
Yumiko:
A high school student and Koichi's girlfriend.
Taizo:
Father of Yumiko. He is the principal of the high school where Koichi and Yumiko attend. Taizo is Koichi's foster parent.
Feres (ryoko):
A school counselor at Koichi's high school. Her true identity is a secret agent of Yomi, sent to watch Koichi's life.
Leon:
A cyborg created by. He transforms himself into plasma emitting high temperature more than 10,000 degrees.