Wendy used to be the girlfriend of Stan Marsh -- and she even killed the subsitute teacher for threatening to steal Stan from her -- but later in the series they seemed to lose interest in each other. She officially broke up with Stan in the Season 7 episode Raisins. She also hates Cartman, although in the Season 4 episode, Chef Goes Nanners, she fell temporarily in love with him and kissed him. Wendy's best friend is a blond-haired girl named Bebe Stevens.
Wendy has had three voices during the series' run: Mary Kay Bergman, Eliza Schneider and Mona Marshall.
She has an unconventional fashion sense. She wears a pink beret, a purple dress, and a yellow skirt underneath. She also wears blue mittens. Underneath her beret is a head of black hair with bangs.