Sophie Jensen

The girl with pigtails is a student in Bart's class who wears her hair in two pigtails.

History
The girl with pigtails is often seen in the background in Bart's class and around Springfield Elementary. Her face often carries a look of discontent. Her hair is normally brown and she wears it in two pigtails. She has never spoken.

Behind the Laughter
Unlike the other background characters in Bart's class, her hair color has remained consistent throughout the show and comics, and is almost always light-brown or blonde.

Trivia

 * She has never spoken on the show, but she makes two unofficial speaking appearances:
 * In The Bart Book under the "Excuses, Excuses" section. There, the excuse she gives is that she is not late for school, she is just "early for tomorrow".
 * In the comic The Secret Life of Bart Simpson, in one of Bart's fantasies where he imagines the school is on fire, she exclaims "Yaaay, Bart!" after one of the firefighters tells everyone that there will be "all the more ice cream and kitties for the kids who survived the fire!"