Trivia: Kin-iro Mosaic
- Common Crossover:
- Karen's sharing the same seiyuu (Nao Touyama) as Kantai Collection's Kongou is a common crossover—especially given Kongou is a personification of a British-made Imperial Japanese warship.
- This series also has a common crossover with Gochuumon wa Usagi desu ka?, due to the fact that both series are Manga Time Kirara Slice of Life titles with similar character archetypes, Moe art designs, and European artistic influences, with Risa Taneda voiced a purple/bluish haired twintail character in both series. There have been two official artbook crossovers and a marketing crossover between the two series.
- What Could Have Been:
- The author mentioned in the first volume's dustflap that she originally wanted a New Transfer Student from a fantasy world rather than a foreign country. Which is a good news, as that concept is already somewhat of a dead horse.
- The work's editor wrote in the art book that originally Shinobu was intended to be a boy who had a better grasp of English than she does.