• 
  Romi Pak

   Ganta Igarashi / ... (12 episodes, 2011)
• 
  Monica Rial

   Shiro (12 episodes, 2011)
• 
  Greg Ayres

   Ganta (12 episodes, 2011)
• 
  Jamie Marchi

   Karako Koshio (6 episodes, 2011)
• 
  Kana Hanazawa

   Shiro (12 episodes, 2011)
• 
  Terri Doty

   Additional Voices (5 episodes, 2011)
• 
  Austin Tindle

   Wakabayashi (12 episodes, 2011)
• 
  Kouzou Douzaka

   Endou / ... (8 episodes, 2011)

• 
  Kanehira Yamamoto

   Undertaker / ... (11 episodes, 2011)
• 
  Shohei Kajikawa

   Wakabayashi / ... (5 episodes, 2011)
• 
  Ayumi Yonemaru

   Ohara (5 episodes, 2011)
• 
  5 episodes, 2011
• 
  Aaron Dismuke

  8 episodes, 2011
• 
  Josh Grelle

  6 episodes, 2011
• 
  Tia Lynn Ballard

  5 episodes, 2011

• 
  Masaaki Itatori

  Avatar
• 
  Hiroto Kazuki

  Aohi-sansa
• 
  Noriaki Morita

  G Block Prison Guard
• 
  Kazutomi Yamamoto

  Yamazaki