Nell Nicholson

The 2nd Grade Sherri and Terri Lookalike is an unnamed girl, who attends Springfield Elementary School.

Behind the Laughter
This character is usually seen in the background at school, but has been seen in other places in Springfield. She usually appears when the episode centers around the school.

She is a second grader and appears in Elizabeth Hoover's class. In a number of episodes she bears a strong resemblance to Sherri and Terri. Despite that, it is not known if she is the third sister, who has been mentioned a few times in the show.

Description
She wears a magenta colored dress, white socks, and magenta colored shoes. She also wears a magenta colored alice band. She also has brown hair.

In numerous episodes her hair, dress, shoes, and alice band are all colored purple to match the appearance of Sherri and Terri.

Trivia

 * It's not known if she is related to the Mackleberry family.