She lives with Emi and her family next to a field of sunflowers (in summer, at least). Her Japanese name just translates to "Sunflower". She and Emi are usually seen in their "secret house", a treehouse in the field of sunflowers.
In the game Hamtaro: Rainbow Rescue, she won't accept her invitation to Rainbow Land unless Stan gives it to her.
- Her Japanese name, "Himawari", literally translates to "sunflower".