Mr. Applegate is a fictional character from the musical and film Damn Yankees. He is portrayed as the devil, who makes a deal with the main character, Joe Hardy, to help him become a star baseball player. Mr. Applegate is cunning and manipulative, using his charm to tempt Joe into giving up his soul for success. In the story, Mr. Applegate represents the struggle between good and evil, as he tries to lead Joe away from his true values. His character adds a layer of conflict and intrigue, making the narrative engaging and thought-provoking for the audience.