* MeanCharacterNiceActor: Kohei Murakami, who portrays Kusaka is this in real life, celebrating Kaixa Day with his fans every year.
* NamesTheSame: Naoya Kaidou shares a family name with [[{{Tsundere}} Kaoru Kaidou]] from ''Manga/ThePrinceOfTennis'' - who, funnilly enough, has the nickname "Mamushi" (Viper) whereas ''Faiz'''s Kaidou is the Snake Orphenoch.
* WhatCouldHaveBeen: There are few elements that never made it to final production. Like [[http://images.wikia.com/kamenrider/images/6/6f/Rejectfaiz.jpg three unused riders]].
* FunnyBackgroundEvent: Very brief and more of a general trivia more than anything else, but in the movie Paradise Lost, comedians [[{{AdamAndJoe}} Adam Buxton and Joe Cornish]] both played extras in the massive crowd during the climactic battle at the stadium. Their peculiar act can be seen [[https://www.youtube.com/watch?v=WHO7SH_mTbE here in all its glory]].