- Yôichi Masukawa
- Â Franz 26 episodes, 2003-2004
- Chris Patton
- Â Manabu Yuki / ... 26 episodes, 2003-2004
- Matthew Tompkins
- Â The Narrator / ... 26 episodes, 2003-2004
- John Gremillion
- Â Bulge / ... 26 episodes, 2003-2004
- Naoki Yanagi
- Â Manabu Yuki / ... 26 episodes, 2003-2004
- Luci Christian
- Â Louis / ... 25 episodes, 2003-2004
- Markus Lloyd
- Â David 25 episodes, 2003-2004
- Amber Cotton
- Â Sexaroid Yuki / ... 24 episodes, 2003-2004
- Mike McFarland
- Â Bruce J. Speed 23 episodes, 2003-2004
- Andy Mullins
- Â Commander / ... 18 episodes, 2003-2004
- Kate Bornemann
- Â Sayaka 18 episodes, 2003-2004
- Laura Bailey
- Â Layla / ... 17 episodes, 2003-2004
- Susan Huber
- Â Kate 15 episodes, 2003-2004
- Stephanie Young
- Â Julia 12 episodes, 2003-2004
- Frank Ford
- Â Brad / ... 10 episodes, 2003-2004
- Hitoshi Kubota
- Â Narration 10 episodes, 2003
- Colin Ware
- Â Silver 9 episodes, 2003-2004
- Caitlin Glass
- Â Ai / ... 8 episodes, 2003-2004
- Daniel Katsuk
- Â Franz 8 episodes, 2003-2004
- Jerry Zumwait
- Â Jose 8 episodes, 2003-2004
- Troy Baker
- Â Wataru Yuuki 7 episodes, 2003-2004
- Jamie Marchi
- Â Maggie 7 episodes, 2003-2004
- Anthony Bowling
- Â Schnader / ... 7 episodes, 2003-2004
- Emily Hornsby
- Â Miki 7 episodes, 2003-2004
- Jennifer Seman
- Â Kanna / ... 7 episodes, 2003-2004
- Trina Nishimura
- Â Miki / ... 7 episodes, 2004
- Linda Young
- Â Kinuko / ... 6 episodes, 2003-2004
- Colleen Clinkenbeard
- Â Shelley 5 episodes, 2003-2004
- Brina Palencia
- Â Additional Voices / ... 5 episodes, 2003-2004
- R. Bruce Elliott
- Â Akatsuki 5 episodes, 2003-2004
- Dave Trosko
- Â Mamoru Yuuki / ... 5 episodes, 2003-2004
- Grant James
- Â Ivanov 5 episodes, 2004
- Mark Lancaster
- Â Additional Voices / ... 4 episodes, 2003-2004
- Justin Pate
- Â Additional Voices / ... 4 episodes, 2003-2004
- Andrew Rye
- Â Additional Voices / ... 4 episodes, 2004
- Steven Morris
- Â Additional Voices / ... 4 episodes, 2004
- Michael Sinterniklaas
- Â Owen / ... 3 episodes, 2003-2004
- Jeff Johnson
- Â Additional Voices / ... 3 episodes, 2004
- Kevin Connolly
- Â Tech 1 / ... 3 episodes, 2003-2004
- Jim Foronda
- Â Shaw 3 episodes, 2003
- Duncan Brannan
- Â Guy Sander 3 episodes, 2003
- Christine M. Auten
- Â General Forecis / ... 3 episodes, 2004
- Christopher Sabat
- Â Additional Voices / ... 2 episodes, 2003-2004
- Dameon Clarke
- Â President Drake 2 episodes, 2003-2004
- Mark Stoddard
- Â Additional Voices / ... 2 episodes, 2003-2004
- Wendy Powell
- Â Additional Voices / ... 2 episodes, 2003-2004
- Ellen Locy
- Â Additional Voices 2 episodes, 2003-2004
- Aaron Dismuke
- Â Young Manabu 2 episodes, 2003
- Sonny Strait
- Â Captain / ... 2 episodes, 2003
- Cynthia Cranz
- Â Ine / ... 2 episodes, 2003
- Bill Flynn
- Â Ooiwa 2 episodes, 2003
- Gwendolyn Lau
- Â Catalina / ... 2 episodes, 2003
- Kara Howell
- Â Announcer / ... 2 episodes, 2003
- Chris Cason
- Â 125 Conductor / ... 2 episodes, 2004
- Cynthia Martinez
- Â Trille / ... 2 episodes, 2004
- J. Paul Slavens
- Â Johansson 2 episodes, 2004
- Jonathan Klein
- Â SPG 2 episodes, 2004
- Charles Baker
- Â Hijacker 1 episode, 2003
- Sean Schemmel
- Â Humanoid B 1 episode, 2003
- Eric Vale
- Â Additional Voices 1 episode, 2003
- Kyle Hebert
- Â Dr. Tallbert 1 episode, 2003
- Kent Williams
- Â Additional Voices 1 episode, 2003
- Stephanie Nadolny
- Â Charlie 1 episode, 2003
- Meredith McCoy
- Â Karen 1 episode, 2003
- Barry Yandell
- Â Additional Voices 1 episode, 2003
- Brice Armstrong
- Â Whitman 1 episode, 2003
- Orion Pitts
- Â Hijacker 1 episode, 2003
- Jonathan C. Osborne
- Â Humanoid A 1 episode, 2003
- Alesa Watson
- Â Mother 1 episode, 2003
- Maria Amelia Park
- Â Additional voices 1 episode, 2003
- Sydney Winn
- Â Young Manabu 1 episode, 2003
- Majken Kunishima
- Â Salye 1 episode, 2003
- Tierney Titus
- Â Additional Voices 1 episode, 2003
- Ace Winn
- Â Young Saboru 1 episode, 2003
- J. Michael Tatum
- Â Trainee 1 episode, 2004
- Monica Rial
- Â Tina 1 episode, 2004
- Justin Cook
- Â Additional Voices 1 episode, 2004
- John Swasey
- Â SPG 1 episode, 2004
- Ed Blaylock
- Â Kiyoji Murase 1 episode, 2004
- Lydia Mackay
- Â Morgana 1 episode, 2004
- Carrie Savage
- Â Liffle 1 episode, 2004
- Steven Walters
- Â Additional Voices 1 episode, 2004
- Sean Teague
- Â Ohyama 1 episode, 2004
- Jerry Russell
- Â Kenderick 1 episode, 2004
- Jim Johnson
- Â Commissioner B 1 episode, 2004
- David Wilson-Brown
- Â Additional Voices 1 episode, 2004
- Chris Forbis
- Â Rigel Captain 1 episode, 2004
- Dana Schultes
- Â Additional Voices 1 episode, 2004
- Cindee Mayfield
- Â Chiyo Murase 1 episode, 2004
- Craig Dvorak
- Â Commissioner A 1 episode, 2004
- Ashley Gonzales
- Â Irene 1 episode, 2004
- Derek Garrison
- Â Bartender 1 episode, 2004
- Judy O'Loughein
- Â Additional Voices 1 episode, 2004
- Kraig Thompson
- Â Bartender 1 episode, 2004
- Suzanne Ashlock
- Â Female Alien 1 episode, 2004
- Nathanael Harris
- Â Trainee 1 episode, 2004
- Asami Sanada
- Â Louise Ford Drake unknown episodes
- Hikaru Midorikawa
- Â David Young / ... unknown episodes
- Takehito Koyasu
- Â Bruce J. Speed unknown episodes
- Akio Ôtsuka
- Â Schwanhert Bulge unknown episodes
- Naoko Suzuki
- Â Sexaroid Yuki unknown episodes
- Kazuhiko Inoue
-  Wataru Yûki unknown episodes
- Yôko Asagami
-  Kanna Yûki / ... unknown episodes
- Aki Minami
- Â Sayaka unknown episodes
- Asuka Tanii
- Â Kate unknown episodes
- Izumi Koike
- Â Miki unknown episodes
- Kayato Ãhashi
- Â Brad unknown episodes
- Ryûsaku Chijiwa
-  Ryûsaku Murase unknown episodes
- Atsushi Imaruoka
-  José Antonio Valdivia unknown episodes
- Wataru Hatano
- Â Edwin Silver unknown episodes
- Yôji Ueda
- Â Moritz Schneider unknown episodes
- Kumiko Yokote
- Â Julia F. Reinhart unknown episodes
- Yûki Mitsugi
- Â Maggie Redford unknown episodes
- Tomato Akai
- Â Ai Matsuura unknown episodes
- Hikari Yono
- Â Kinuko Asai / ... unknown episodes
- Mitsuaki Hoshino
-  Tarô Akatsuki unknown episodes
- Clarine Harp
- Â Additional Voices unknown episodes
- Ricky Page
- Â Additional Voices unknown episodes
- Chance Munsterman
- Â Additional Voices unknown episodes