Isabelle is a nearsighted bright yellow dog who resembles a Shih Tzu, which her Japanese name, Shizue, is a play on. Her head is also shaped like a bag of bells, hence the English name. She has a happy appearance with rosy cheeks and with a white fur patch on her tail and around her mouth. She wears a green checkered vest with a white top and a red ribbon underneath with a navy blue skirt. During fall and winter, she wears a yellow cardigan instead of a vest. Her hair is tied up with a red elastic with bells attached which actually jingle as she walks.