• 
  David Lodge
• 
  Tony Oliver

   Narrator / ... (27 episodes, 2007-2008)
• 
  Bridget Hoffman

   Old Nia Teppelin (27 episodes, 2007-2008)
• 
  Steve Blum

   Leeron Littner (27 episodes, 2007-2008)
• 
  Johnny Yong Bosch

   Rossiu (27 episodes, 2007-2008)
• 
  Yukari Fukui

   Nia Teppelin (27 episodes, 2007-2008)
• 
  Barbara Goodson

   Kunba (27 episodes, 2007-2008)
• 
  Nobuyuki Hiyama

  Viral

• 
  Doug Stone

   Dayakka (27 episodes, 2007-2008)
• 
  Christopher Corey Smith

   Kittan (27 episodes, 2007-2008)
• 
  Katsuyuki Konishi

  Kamina
• 
  Yuri Lowenthal

  Simon
• 
  Jamieson Price

  Lord Genome
• 
  Masaya Onosaka

   Leeron Littner (27 episodes, 2007-2008)
• 
  Sam Riegel

  Viral

• 
  Michelle Ruff

  Yoko Littner
• 
  Mitsuki Saiga

   Rossiu (27 episodes, 2007-2008)
• 
  Brett Weaver

  Kamina (ADV Dub)
• 
  Karen Strassman

   Kiyoh (27 episodes, 2007-2008)
• 
  Kyle Hebert

  Kamina
• 
  Kishô Taniyama

   Kittan (27 episodes, 2007-2008)
• 
  Kana Ueda

   Kinon (27 episodes, 2007-2008)
• 
  Stephanie Sheh

   Kinon (27 episodes, 2007-2008)
• 
  Shizuka Itô

   Boota (27 episodes, 2007-2008)
• 
  Rina Satô

   Kiyoh (27 episodes, 2007-2008)
• 
  Marina Inoue

  Yoko Littner
• 
  Tetsuya Kakihara

  Simon
• 
  David Lee McKinney

  Simon (Animax Dub)
• 
  Kana Asumi

   Kiyal (27 episodes, 2007-2008)
• 
  Dave Bridges

  Kamina (Animax Dub)
• 
  Andrea Kwan

   Nia Teppelin (Animax dub) (27 episodes, 2007-2008)
• 
  Daiki Nakamura

   Dayakka (27 episodes, 2007-2008)