| Episode credited cast: |
 | Toshiya Fuji | - | Gaku Hoshikawa / Five Red |
| Kei Sindachiya | - | Ken Hoshikawa / Five Blue |
| Ryouhei Kobayashi | - | Fumiya Hoshikawa / Five Black |
| Kazuko Miyata | - | Kazumi Hoshikawa / Five Pink |
| Megumi Sakita | - | Remi Hoshikawa / Five Yellow (as Keiko Hayase) |
 | Rica Matsumoto | - | Arthur G6 (voice) |
| Chika Matsui | - | Galactic Empress Meadow |
| Takeshi Ishikawa | - | Captain Garoa |
| Hatsue Nishi | - | Doldora |
| Haruko Watanabe | - | Zaza |
| Kihachiro Uemura | - | Captain Chevalier |
| Rest of cast listed alphabetically: |
| Shunsaku Kudô | - | Galactic Swordsman Billion |
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