Muffy Crosswire is a character from the animated children's series Arthur. She is known for her wealthy background and her confident, sometimes sassy personality. Muffy often showcases her love for fashion and luxury, which sets her apart from her friends. Despite her privileged lifestyle, she values friendship and often learns important lessons about kindness and humility. Muffy is the daughter of Mr. and Mrs. Crosswire, who own a successful business. She attends Lakewood Elementary with her friends, including Arthur Read and Francine Frensky. Throughout the series, Muffy's character development highlights themes of social status and personal growth.