Allie Nelson

The Girl with a Pink Sweater is a background character on South Park. She has appeared in the backgrounds of many recent episodes. She was seen in Mr. Garrison's class in the episode "The Tale of Scrotie McBoogerballs" and is sometimes seen as a background character. After Pip died, she seems to have taken his seat in the classroom as seen in Royal Pudding.

Appearance
She has shoulder-length brown hair and wears a pink sweater, a grey skirt (unlike most girls in her grade such as Wendy, Bebe, Red, Annie, Lola, and others. The only other 4th grader known to wear a skirt is the Blonde Girl)

Episodes she is prominent in 


 * The Tale of Scrotie McBoogerballs


 * Elementary School Musical


 * Royal Pudding


 * T.M.I