Muffy Crosswire- Arthur; 3rd grader in Mr. Ratburn's class at Lakewood Elementary. She is the richest girl in Elwood City, & lives in an enormous mansion. is often labeled snobbish & spoiled because of her wealth, attitude, & frequent selfishness. believes that money, Bailey, & her dad can fix any problem. However, in some fields Muffy is good at giving advice like fashion or love.