Trivia / Kamen Rider 555

• The entirety of Faiz; all its episodes and movies, were written by the head writer alone, Toshiki Inoue. This feat of writing every episode would not be repeated in a Super Hero Time production until a decade later with Riku Sanjō's Zyuden Sentai Kyoryuger, and would not be repeated in Kamen Rider until Yuya Takahashi did it in Kamen Rider Ex-Aid.
• Name's the Same: Naoya Kaidou shares a family name with Kaoru Kaidou from The Prince of Tennis - who, funnilly enough, has the nickname "Mamushi" (Viper) whereas Faiz's Kaidou is the Snake Orphenoch.

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• What Could Have Been: There are few elements that never made it to final production. Like three unused riders◊.