- Yûma Ishigaki
- Geki Jumonji / Space Sheriff Gavan Type-G
- Ryûji Sainei
- Banban 'Ban' Akaza / Deka Red
- Tsuyoshi Hayashi
- Houji 'Hoji' Tomasu / Deka Blue
- Yousuke Itou
- Senichi 'Sen-chan' Enari / Deka Green
- Ayumi Kinoshita
- Reimon 'Jasmine' Marika / Deka Yellow
- Mika Kikuchi
- Koume 'Umeko' Kodou / Deka Pink
- Tomokazu Yoshida
- Tekkan 'Tetsu' Aira / Deka Break
- Suzuka Morita
- Shelly
- Mako Ishino
- Swan Shiratori
- Kenji Ôba
- Retsu Ichijôji / Space Sheriff Gavan (as Kenji Ohba)
- Tetsu Inada
- Doggie Kruger / Deka Master (voice)
- Jun'ichi Haruta
- Mad Gallant
- Mikie Hara
- Benikiba
- Ryôko Yûi
- Sophie
- Hiromi Sakimoto
- Larz
- Tomokazu Seki
- Kuronen
- Yûto Uemura
- Hikaru Hiwatari
- Michi Nishijima
- Pon Emi
- Ibuki Yoshikawa
- Receptionist
