Adventures on a Balloon

Fuyumi Shiraishi

Bokko or Bonnie in the American version

Yasuo Kojima

Nokko (Ronnie in the American version)

Yoshio Kanauchi

Kōichi Hoshi (Randy Carter in the American version)

Shinsuke Chikaishi

Pukko (Zero in the American version)

Kazuko Sawada

Shinichi Hoshi (Kenny Carter in the American version)