- Hiroshi Kamiya
- Â Masanobu Hojou 26 episodes, 2004
- John Swasey
- Â Naozumi Saito 26 episodes, 2004
- Daisuke Namikawa
- Â Kei Kurono 26 episodes, 2004
- Chris Patton
- Â Joichiro Nishi 26 episodes, 2004
- Chris Ayres
- Â Kei Kurono 26 episodes, 2004
- John Gremillion
- Â Ryuji Kajiura 26 episodes, 2004
- Mitsuaki Madono
- Â Hajime Muroto 26 episodes, 2004
- Kira Vincent-Davis
- Â Sadayo Suzumura 26 episodes, 2004
- Shannon Emerick
- Â Kei Kishimoto 26 episodes, 2004
- Hitomi Nabatame
- Â Kei Kishimoto / ... 26 episodes, 2004
- Illich Guardiola
- Â Masaru Kato 26 episodes, 2004
- Mie Sonozaki
- Â Sei Sakuraoka / ... 26 episodes, 2004
- Kelly Manison
- Â Sei Sakuraoka 26 episodes, 2004
- Emily Carter-Essex
- Â Yoshino Uehara 26 episodes, 2004
- Bin Sasaki
- Â Suzuki 26 episodes, 2004
- Xero Reynolds
- Â Masanobu Hojo / ... 26 episodes, 2004
- Masashi Oosato
- Â Masaru Kato 26 episodes, 2004
- Tiffany Salinas
- Â Suzuki Seijin Alien / ... 8 episodes, 2004
- Gene Tognacci
- Â Kinji 6 episodes, 2004
- Takurou Nakakuni
- Â Eiji Nakazawa / ... 5 episodes, 2004
- Hajime Iijima
- Â Boy / ... 4 episodes, 2004
- Victor Carsrud
- Â Additional Voices / ... 4 episodes, 2004
- Greg Ayres
- Â Delinquent C / ... 3 episodes, 2004
- George Manley
- Â Bill Collector B / ... 3 episodes, 2004
- Matt Greenfield
- Â Bill Collector A / ... 3 episodes, 2004
- Mike Vance
- Â Kosuke / ... 3 episodes, 2004
- Susan O. Koozin
- Â Additional Voices / ... 3 episodes, 2004
- Touko Aoyama
- Â Ayumu Kato / ... 3 episodes, 2004
- Alyssa Anderson
- Â Additional Voices / ... 3 episodes, 2004
- Nikki Thomas
- Â Little Girl / ... 3 episodes, 2004
- Robert Anderson
- Â Gang Leader / ... 3 episodes, 2004
- Luci Christian
- Â Ayumu Kato / ... 2 episodes, 2004
- Mike McFarland
- Â Additional Voices / ... 2 episodes, 2004
- Spike Spencer
- Â Greenonion Alien / ... 2 episodes, 2004
- Jessica Boone
- Â Ko-gal / ... 2 episodes, 2004
- Rob Mungle
- Â Hatanaka 2 episodes, 2004
- Blake Shepard
- Â Additional Voices / ... 2 episodes, 2004
- Jay Hickman
- Â Inamori 2 episodes, 2004
- Mike MacRae
- Â Newscaster / ... 2 episodes, 2004
- Yoshihisa Kawahara
- Â Karate Club Captain / ... 2 episodes, 2004
- Bob Biggerstaff
- Â Golden W Guy / ... 2 episodes, 2004
- James Faulkner
- Â Big Greenonion / ... 2 episodes, 2004
- Jonathan C. Osborne
- Â Delinquent B / ... 2 episodes, 2004
- Hikari Yono
- Â Child A / ... 2 episodes, 2004
- Rick Piersall
- Â Syunichi Ike 2 episodes, 2004
- Sasha Paysinger
- Â Kid with Man / ... 2 episodes, 2004
- Kurt Stoll
- Â Matsumura 2 episodes, 2004
- Jason Grundy
- Â Green Statue 2 episodes, 2004
- Andy McAvin
- Â Konta / ... 2 episodes, 2004
- Naoya Iwahashi
- Â Matsumura / ... 2 episodes, 2004
- Paul Sidello
- Â Book Store Owner / ... 2 episodes, 2004
- Mike Kleinhenz
- Â Goro Suzuki 2 episodes, 2004
- Russell Freeman
- Â Masashi Yamada 2 episodes, 2004
- Jason Douglas
- Â Tetsuo 1 episode, 2004
- Brittney Karbowski
- Â Kato's Cousin 1 episode, 2004
- Monica Rial
- Â Additional Voices / ... 1 episode, 2004
- Sam Saletta
- Â Ki- Cho 1 episode, 2004
- Melinda DeKay
- Â Grandmother 1 episode, 2004
- Tiffany Grant
- Â Additional Voices 1 episode, 2004
- Christine M. Auten
- Â Tetsuo's Wife 1 episode, 2004
- Yumi Kakazu
- Â Sadayo Suzumura 1 episode, 2004
- Yutaka Aoyama
- Â JJ 1 episode, 2004
- Yumiko Kobayashi
- Â Ryota Sugihara 1 episode, 2004
- Hiroshi Shirokuma
- Â Buddha Statue 1 episode, 2004
- Naomi Kusumi
- Â Muso Tokugawa 1 episode, 2004
- Kentarô Itô
- Â Kiyoshi Miyafuji 1 episode, 2004
- Brett Weaver
- Â Akitoshi 1 episode, 2004
- Kimiko Saitô
- Â Kato's Aunt 1 episode, 2004
- Susumu Chiba
- Â Inamori 1 episode, 2004
- Tsuyoshi Koyama
- Â Tachibana 1 episode, 2004
- Chiaki Takahashi
- Â Reporter 1 episode, 2004
- Satoshi Tsuruoka
- Â Haruya 1 episode, 2004
- Kiyoshi Hirose
- Â Stalker 1 episode, 2004
- Kôji Tsujitani
- Â Ryuuji Kajiura 1 episode, 2004
- Jirô Saitô
- Â Adult Greenonion Alien 1 episode, 2004
- Yoshikazu Nagano
- Â Child Greenonion Alien 1 episode, 2004
- Kaoru Sasajima
- Â Mika Kanda 1 episode, 2004
- Yoshinori Fujita
- Â Student 1 episode, 2004
- Mayumi Yamaguchi
- Â Young Kato 1 episode, 2004
- Laura Chapman
- Â Kato's Aunt 1 episode, 2004
- Adam Conlon
- Â Yonekura 1 episode, 2004
- Ken'ichi Morozumi
- Â Yoshioka 1 episode, 2004
- Kôichi Nagano
- Â Yamada 1 episode, 2004
- Rakkyo Ide
- Â Suzuki Alien 1 episode, 2004
- Masahito Kawanago
- Â Tetsuo 1 episode, 2004
- Marcy Rae
- Â Old Lady 1 episode, 2004
- Takahiro Yoshino
- Â Kinji 1 episode, 2004
- Yasuko Hatori
- Â Old Lady 1 episode, 2004
- Jacob A. Gragard
- Â Shop Clerk B 1 episode, 2004
- Paul Locklear
- Â Delinquent 1 episode, 2004
- Kanako Mitsuhashi
- Â Shiori Kishimoto 1 episode, 2004
- Takehiro Murozono
- Â Male Teacher 1 episode, 2004
- Takurô Kitagawa
- Â Book Store Owner 1 episode, 2004
- Alissa Anderson
- Â Additional Voices 1 episode, 2004
- Masayuki Nakata
- Â Naozumi Saito 1 episode, 2004
- Jose Diaz
- Â Tomao 1 episode, 2004
- Toshiko Yoshimura
- Â Kayo Sugihara 1 episode, 2004
- Jun'ichi Endô
- Â Akitoshi Okazaki 1 episode, 2004
- Toshiko Komura
- Â Kayo Sugihara 1 episode, 2004
- Shingo Uchida
- Â Customer 1 episode, 2004
- Yuiko Tanaka
- Â Manabu 1 episode, 2004
- Miharu Iijima
- Â Female Student 1 episode, 2004
- Masahito Yabe
- Â Nishi Joichiro 1 episode, 2004
- Ted Pfister
- Â Salaryman 1 episode, 2004
- Stuart Krohn
- Â Student 1 episode, 2004
- Kôjirô Hayashi
- Â Station Attendant 1 episode, 2004