- 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.
- Bonus Episode: Kamen Rider 555: Hyper Battle Video was released with an issue of Televi-Kun Magazine.
- 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.
- Meme Acknowledgement: Due to how famous it is to "celebrate" Masako Kusaka on September 13 (9/13), on that very date on 2019, the retelling of Kaxia Gear arc Kamen Rider 913 was first announced on that date.
- What Could Have Been: There are few elements that never made it to final production. Like three unused riders◊.
- The Wiki Rule: Covered as part of Kamen Rider Wiki, and as an individual series on the Kamen Rider 555 Wiki.