Heidi is often sweet and socially friendly, although in earlier seasons she proved to sometimes be unkind to the point of cruelty. She is one of the popular girls in highschool. Heidi is a genial, thoughtful, cute, and sweet girl. She is one of the nicest and most socially sensitive girls in South Park. Heidi cares a lot about her appearance, and as a result, it takes her longer than usual to get ready for special events. She is a waitress at a restaurant called Denny's.