edna krabappel

One of the many characters of the American animated comedy sitcom The Simpsons, she was the teacher of Bart Simpson.
Al Jean announced Edna would be retired due to the death of Marcia Wallace (her voice actress) on October 25, 2013. The process began in "Four Regrettings and a Funeral" when "We'll really miss you Mrs. K." was shown on the chalkboard gag during the title sequence, which premiered nine days after Marcia's death. In the Season 25 episode "The Man Who Grew Too Much", Ned and Nelson mentioned that they miss her. Her passing was indicated by Ned wearing a black armband, but was never shown on-screen.