Akira's father died while he was young and he was an only child. He moved to Tokyo in order to perfect his martial arts ability and to join the Maskman. Akira unknowingly enters a Tube-rigged tournament. He wants to win to prove to his mother that he is successful in his chosen pursuit. In episode 44, he became the legendary Earth Imperial Swordsman Unas after being possessed by the spirit of a swordsman of the Royal Underground Empire through the Yoroi Doggler, the Legendary Knight's Vassal. Unas was originally being summoned by some of the Royal Underground slaves of Tube in hopes that he would help set them free from Zeba's tyrannical rule. Seeing that Akira was the next Unas, Tube concluded that he is possibly from the Underground, or is somehow related to them, but the truth is that the underground slaves mistook Akira as an reincarnation of Unas when he saved a group of slaves earlier in the series.
Blue Mask
（Akira）Akira's father died while he was young and he was an only child. He moved to Tokyo in order to perfect his martial arts ability and to join the Maskman. Akira unknowingly enters a Tube-rigged tournament. He wants to win to prove to his mother that he is successful in his chosen pursuit. In episode 44, he became the legendary Earth Imperial Swordsman Unas after being possessed by the spirit of a swordsman of the Royal Underground Empire through the Yoroi Doggler, the Legendary Knight's Vassal. Unas was originally being summoned by some of the Royal Underground slaves of Tube in hopes that he would help set them free from Zeba's tyrannical rule. Seeing that Akira was the next Unas, Tube concluded that he is possibly from the Underground, or is somehow related to them, but the truth is that the underground slaves mistook Akira as an reincarnation of Unas when he saved a group of slaves earlier in the series.