The Brown-haired girl is a student at Springfield Elementary School.
Together, the trio likely bullied other kids, with Lisa being the one of their victims. However, she and her friends did bully Allison once, during the episode "Lisa's Rival".
After "Home Sweet Homediddly-Dum-Doodily", where she and her friends took away Lisa's shoes and teased her about having cooties, she become a background character.
She didn't play a role in the series again, until the episode "Moms I'd Like to Forget", where she was part of a number of fourth grade kids, who were insulting the fifth graders with a song.
The brown haired girl is usually seen with brown hair, whether dark brown or light brown. There are a few episodes she's seen with blonde hair.
In Lisa's Rival, she had a noticeable mold on her right cheek, which was only seen in that episode. She wears a dress, ankle high white socks, and Mary Jane shoes.
- It's not known if she or her friends still bully other kids at school.
Note: The episodes in which she has an actual role is in bold.