Hamtaro's Mother, who is named Yuki (ゆきちゃん, Yuki-chan), appeared in a photo and in the sky as a spirit in Hamtaro: 3000 Steps to Mommy (OVA). According to Hamtaro, she is "a white and fluffy wonderful mommy". Her spirit told Hamtaro that as long as he is with his friends, she will always be with him too.
- Her role in Happy Birthday Hamtaro Special! is cut as her part in the story (her death) was deemed too dark for the US audience.