Lisa's Friend #3 is a girl that appears in the episode "Brick Like Me" as 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 is surprised when Lisa whispers a swear word in her ear because her grandfather said it at Thanksgiving once, and she also revealed that she has a father which doesn't appear but is mentioned in the episode.
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 has shoulder length auburn hair which is down with a couple of layers and a side fringe. She wears a light purple shirt which has a face of a bear on it, blue-grey jeans and purple shoes, she is also seen holding a Survival Games book in her hand.
It is possible that the girl is a middle school student based on her age as she and her friends don't attend Springfield Elementary School but is unknown what school the girls attend.