Characters

The main cast of characters in the series includes (English-language voice actors in brackets):

Original characters

 * Justin Casey (Billie Lou Watt) – The main protagonist of the series. His Japanese counterpart Gen Adachi is voiced by Satomi Majima.
 * Angela Roberts ("Angie") (Sonia Owens) – Justin's girlfriend and the deuteragonist. Her Japanese counterpart, Kanna, is voiced by Sanae Takagi.
 * Corkey Roberts (Helena Van Koert) – Angie's younger brother and the tritagonist. His Japanese counterpart, Tsukubo, is voiced by Runa Akiyama.
 * Solar Ion Robot ("SIR") or Kadenchin in Japanese
 * Professor Humphrey Bumble, name originally Tokio Taimu in Japanese.

Religious figures

 * Paul (Hal Studer)
 * Jesus Christ (Ray Owens) - voiced by Jun Hazumi in Japanese.