Ms. Nibsy is a round, red cat toy with brown eyes and a cartoon-style animal mouth with a pink tongue hanging out on the side. Her ears are in triangular shapes, showing that she is indeed a cat or fox. She has a peach-colored belly and short, stumpy limbs. She has an orange bow on her head but no visible tail. There is also a visible belly button.
In "The Donut of Shame," she is blue with a pink bow.