Tanya is a girl who is one of Lisa's friends, often playing with her and Janey. When not hanging out with them, she picks flowers for her to create things later. She attended the Enriched Learning Center for Gifted Children, and was in the same class as Bart when he swapped his and Martin's test so he wouldn't fail. Tanya looks similar to a young Marge. She was also seen in Lisa's math class when the school was split into two groups: boys and girls.
Behind the Laughter
Tanya was considered a major character during the creation of The Simpsons Rainy Day Fun Book and The Simpsons Fun in the Sun Book, even getting a major role in a cut-out theater. However, she never received a big role in the show and can only be seen in backgrounds.
Despite being a minor character and not a major character, she has made the most appearances out of all of the smart kids from "Bart the Genius".