The Willie character half mask or Dr. William “Willie” MacDougal III is the groundskeeper and janitor at the elementary school. He appears in act 2 of the play Mr. Burns… This act is based off an episode of the Simpsons called Cape Feare . The act is a musical odyssey that leads to the last act of the play that takes place 75 years later.
Willie is in a way the professional wrestler of the Simpsons in that he often has to rip off his shirt to accomplish physical tasks. This reveals of course that he is incredible shape.
The mask in this case presents a severe expressive form that celebrates the abrasive qualities of the character but is also capable of kindness and generosity.