- Fake Nationality: Grenouille, Laura and Antoine are French people played in the film by Brits, while Baldini is an Italian played by an American.
- Filk Song: It inspired at least five, including "Scentless Apprentice", "Red Head Girl", "Du riechst so gut", and "Nearly Witches (Ever Since We Met...)".
The music group:
- Hey, It's That Guy!: The girls briefly appeared as the camera/staff crew in OK Go's "I Won't Let You Down" MV.
- The Pete Best: Kawayuka left not long after the band started, because she wanted to focus on her studies (all the members were still in junior high school at the time). After a consultation with her mother, who said a duo couldn't match the stage presence of a trio, A~chan asked Nocchi to join.
- What Could Have Been: They had also considered the name Y.A.Y., for Yuka, Ayaka & Yuuka.