The ruler of the underground world, is planning to conquer the whole world. Riding the fire dragon Isamu and Angel, the princess of the undersea kingdom, try to stop him from destorying their world.
| Actor | Role |
|---|---|
 Masako NozawaIsamu (voice) | Isamu (voice) |
 Kurumi KobatoAngel (voice) | Angel (voice) |
 Gorō NayaKing Magma VII (voice) | King Magma VII (voice) |
 Akira HitomiTail (voice) | Tail (voice) |
| KKatsuwo UminoOctopus (voice) | Octopus (voice) |
 Yonehiko KitagawaSea King (voice) | Sea King (voice) |
 Reiko SenoIsamu's Mother (voice) | Isamu's Mother (voice) |
 Tetsuya KajiIsamu's Father (voice) | Isamu's Father (voice) |
 Ichirô MurakoshiCaptain (voice) | Captain (voice) |
 Keiichi NodaAnnouncer (voice) | Announcer (voice) |