Mrs. Fitzgibbon
Mrs. Fitzgibbon is Mr. Fitzgibbon's wife, and dislikes that mice and rats are in their house. She was making Dragon's food and set it down on the floor and went to get Dragon when she heard Billy yell that he had caught a mouse. She tries to convince Billy to let it go at dinner but he begs for it to stay. Mrs. Fitzgibbon finally agrees to let him keep it.