Kaito Ishikawa
- Gunvolt
- (Japanese version)
- (voice)
Megu Sakuragawa
- Joule
- (Japanese version)
- (voice)
- …
Masashi Yukita
- Asimov
- (Japanese version)
- (voice)
Moemi Otaka
- Moniqa
- (Japanese version)
- (voice)
Haruki Ishiya
- Zeno
- (Japanese version)
- (voice)
Kôsuke Masuo
- Copen
- (Japanese version)
- (voice)
Ayumu Murase
- Nova
- (Japanese version)
- (voice)
Yûta Kasuya
- Merak
- (Japanese version)
- (voice)
Diana Garnet
- Joule
- (English version)
- (voice)
- …
Hannah Grace
- Moniqa
- (English version)
- (voice)
Josh Keller
- Gunvolt
- (English version)
- (voice)
Hideki Makino
- Romeo
- (Japanese version)
- (voice)
Vinay Murthy
- Merak
- (English version)
- (voice)
Chris Nelson
- Nova
- (English version)
- (voice)
Maxwell Powers
- Asimov
- (English version)
- (voice)
Cyrus Nozomu Sethna
- Romeo
- (English version)
- (voice)
- (as Cyrus Sethna)
Peter von Gomm
- Copen
- (English version)
- (voice)
- (as Peter Von Gomm)
Steve Wiley
- Zeno
- (English version)
- (voice)
- (as Stephen Wiley)