- All-Star Cast:
- Big Name Fan: The series has been approved by Eiichiro Oda, the mangaka behind One Piece.
- Cross-Dressing Voices: Norman and Ray are voice by female voice actresses Maaya Uchida and Mariya Ise. The same goes for pretty much all of the other male children with the exception of Don.
- Fan Nickname:
- "The promised keikaku", due to how absurd the feats during the Escape Arc are.
- The unnamed bunker man has been given the placeholder name "John" in some places due to a misinterpretation of a few panels and the term "John Doe", or an unidentified person.
- "Scribbles" has become the dedicated name for the demon god whose name is unpronounceable and unwritable.
- Playing Against Type: Jeannie Tirado as Norman.
- Relationship Voice Actor: A female lead voiced by Erica Mendez rebelling against a "mom" voiced by Laura Post? Now where in Aniplex's library has that been done before? Add Jeannie Tirado and Cristina Valenzuela into the mix and it's basically a crossover between members of μ's and Aqours.
- Sleeper Hit: The manga is made by two authors nobody has ever heard of and came out in the middle of a wave of new series that were often ill-fated, all the while being a horror-mystery story in a magazine mostly centered on action-adventure, sports and romantic comedy. It and Dr. Stone, which is in a similar case, both climbed to the top of the magazine's rankings in less than a year.
Trivia / The Promised Neverland