Lisa's Friend 4 is a girl who is one of Lisa's new friends.
She is first seen in Lisa Simpson's bedroom with two other girls with a discussion about the Survival Games movie. She says that due to her age, the girl wouldn't hang out with someone like Lisa, but one day, she saw Lisa's Survival Games book report hanging from the hallway, which impressed the girls.
The same girl appears in the Aztec Theater watching the Survival Games movie with Lisa and her two friends. However, since all three girls are present, they all sit on different aisles, her first friend is seen sitting next to her but the second friend is next to Lisa Simpson on the second row.
She could possibly returned in Hail to the Teeth as a second grade student in Lisa's class. Her outfit has changed since her first appearance as she is seen wearing a dark red dress with a tan waistcoat, navy blue tights and light brown ankle boots with green pearl earrings.
She has wavy dark brown hair with a fringe although her hair was coloured black in her second appearance. In her first appearance she wears an orange shirt, brown leggings, blue-grey Mary Janes with socks and a light blue skirt that is presumably made of denim. In her second appearance her outfit now consists of a dark red dress with a tan waistcoat, navy blue tights and light brown earrings, her hoop earrings have been replaced by pearl earrings.