Peggy is a kangaroo balloon animal that was brought to life one day by a wizard who was practicing magic on various objects. She later ran away with her husband Marty and started a successful party business selling all sorts of different party equipment. She's sweet, smart, and honest and tends to do more party planning than her often-distracted husband. She's very good at math and handles the finances. Lots of people come to her for financial advice.

Although she's a balloon, she can't be popped and has weights inside her feet to keep her grounded. She's a bit scared about blowing away so she often ties a rope to her tail so someone can catch her. She can rearrange her proportions by shuffling air to different parts of her body, but tends to keep herself mostly even. She has to be refilled with air at least once a year.