- Yaguti voiced by Mari Yaguchi
- Kago voiced by Ai Kago
- Mika voiced by Mika Todd
- Tuji voiced by Tsuji Nozomi
- Aiko voiced by Ai Takahashi
- Gu doesn't appear in Hamtaro: Ham Ham Grand Prix - The Miracle of Aurora Valley, due to Mari Yaguchi leaving the group
- In Boo Manor of Hamtaro: Ham-Ham Heartbreak, a photo album on one of the bookshelves is titled "Mini-Hams".