- Patricia Pearcy
- Â Maureen unknown episodes
- Shin'ichirô Miki
- Â Hydra Eda unknown episodes
- Shigeru Chiba
- Â Hibio's Father unknown episodes
- Charles C. Campbell
- Â Additional Voices unknown episodes
- Toshio Furukawa
- Â Arnold Eda unknown episodes
- Nobutoshi Canna
- Â Additional Voices unknown episodes
- Ken Webster
- Â Father unknown episodes
- David Stokey
- Â Eric unknown episodes
- Gray G. Haddock
- Â Hydra unknown episodes
- Yûji Ueda
- Â Hibio unknown episodes
- Satomi Kôrogi
- Â Fujimatsu unknown episodes
- Takeshi Aono
- Â Fujimatsu's Grandfather unknown episodes
- Lowell Bartholomee
- Â Additional Voices unknown episodes
- Fumi Hirano
- Â Hibio's Mother unknown episodes
- Ellie McBride
- Â Additional Voices unknown episodes
- Mariko Kôda
- Â Nima unknown episodes
- Lauren Worsham
- Â Bala unknown episodes
- Toshiya Ueda
- Â Additional Voices unknown episodes
- Junko Shimakata
- Â Nike unknown episodes
- John Paul Shepard
- Â Additional Voices unknown episodes
- Joey Gibson
- Â Brody unknown episodes
- Dara Aylor
- Â Kandar unknown episodes
- Shihori Niwa
- Â Additional Voices unknown episodes
- Kelley Huston
- Â Kiki unknown episodes
- Kevin Remington
- Â Arnold unknown episodes
- Missy Atwood
- Â Lisa unknown episodes
- Mie Odagi
- Â Additional Voices unknown episodes
- Hisayoshi Izaki
- Â Additional Voices unknown episodes
- Olaf Bjornstal
- Â Deiner unknown episodes
