• 
  Lee West

  Voci adiţionale
• 
  Kôichi Yamadera

  Zerbebuth
• 
  Jurota Kosugi

  Elegen
• 
  Melissa Fahn

  Mizuki Segawa
• 
  Norio Wakamoto

  Oswald A. Risker/Guyver-II
• 
  Yutaka Maseba

  Voci adiţionale
• 
  Hideyuki Tanaka

  Agito Makishima/Guyver-III
• 
  Takeshi Kusao

  Shô Fukamachi/Guyver-I

• 
  Steve Blum

  Agito Makishima
• 
  Hidekatsu Shibata

  Richard Guyot
• 
  Hideyuki Umezu

  Takazato
• 
  Yûko Mizutani

  Mizuki Segawa
• 
  Banjô Ginga

  Gaster
• 
  Steve Areno

   Masaki Murakami (6 episodes, 1990-1992)
• 
  Susan Byrkett

   Secretary (6 episodes, 1990-1992)

• 
  Tom Fahn

   Sho Fukamachi (12 episodes, 1989-1992)
• 
  Víctor García

   Tetsuro Segawa (12 episodes, 1989-1992)
• 
  Seizo Kato

   Dr. Hamilcar Barcas (6 episodes, 1990-1992)
• 
  Kôzô Shioya

   Tetsuro Segawa (12 episodes, 1989-1992)
• 
  Hirotaka Suzuoki

   Masaki Murakami (6 episodes, 1990-1992)
• 
  Sonny Byrkett

   Dr. Balcus (6 episodes, 1990-1992)
• 
  Hal Cleaveland

   Narrator (6 episodes, 1990-1992)