- The Bandit
- Makoto Takiya
- Haru appears in a newspaper in chapter 10.
- Miki is running a crepe stand in chapter 7 and his picture can be seen in a cookbook in chapter 10.
- Kobayashi buys Elma some food from the Horiuchi Butchery in chapter 25.
- Kanna gets a keychain of Frau Rabbit after her first day of school.