Mrs. Cardigan

Mrs. Cardigan is a retired piano teacher, whose former students include Arthur Read and Dr. Fugue.

Personality
Mrs. Cardigan is easy-going and gentle and would offer each student a cookie for having a wonderful lesson. Her favorite flavor of cookies is double chocolate chip. She is much like Miss Sweetwater and Mrs. Fink in terms of teaching reputation.

Trivia

 * The book based on the episode indicates that Dr. Fugue was one of her past students.