Japanese valet Kyto doesn't start out this way, but he avoids being an Ethnic Scrappy in the first book and earns the status in the sequel with the reveal that he's a proficient, well-educated foreign spy who had a Becoming the Mask epiphany.
Marian Jackson, a tertiary character from from the second book, is better-liked than some of the main cast due to being a Closer to EarthNon-Protagonist Resolver who is repeatedly underestimated by the main characters.
Unintentional Period Piece: Hitler and Mussolini are casually mentioned as contemporary world leaders who are widely despised but aren't actively at war with many other nations at the time, giving the book a very 1930s vibe.
The matte painting showing the flooded and destroyed New York City, especially since its destruction was depicted earlier with models.
A string can be visible on the nose of the ship after they land on Zyra.
The not entirely convincing matte painting of Zyra at the end of the movie was originally meant to be a preliminary sketch. Unfortunately due to time and money constraints the artist wasn't able to produce a better work in time to be filmed.
Unintentional Period Piece: The plates on which the Bronson bodies were discovered are being shipped to the United States. By flying boat. The film also features a mechanical computer.