Heather Wold, known for decades simply as the "little red-haired girl" in Peanuts, was Charlie Brown's secret crush but he was often too afraid to approach her. She was given the name Heather in the 1977 animated TV special It's Your First Kiss, Charlie Brown and as Heather Wold in the 2015 animated film, The Peanuts Movie, although her name was never given in the comic strip.
In "80's Guy", Doug challenges Stewie to a race to the top of the jungle gym to retrieve his frisbee in front of a gathering of kids including the little red-haired girl. Stewie notes that he values her opinion more than any of the others, but she dismisses that as he only was interested in her to wear her ballerina skirt.