later exposed at their Aunt Lucy's wedding. Monique "Mo" (voiced by Melissa Pirrera) is Arthur, D.W., and Kate's oldest cousin, whom Arthur remembers as being awful to him at past family reunions; he tries to avoid her until it is revealed that Mo isn't as bad as Arthur thought. She, like Arthur, plays the piano and says that Arthur is her favorite relative. Mo is the daughter of Loretta and has an athletic younger brother close to Arthur's age and a younger sister close to D.W.'s age. Cousin Ricky is Mo's brother and Bud and Loretta's son. He is very athletic and somewhat bossy. His skin color changes in each episode he appears in. Cousin Ryder is Arthur's age and lives on the family farm in Ohio. While he and Arthur used to be close, they discover in "The Rhythm and Roots of Arthur" that they are pretty different and come to terms with their differences. Laurie is Ryder's baby sister. Cousin Miles grew up in Cleveland, but he has spent so many years living and working on the Read family farm that he has become a part of the family. He is the chief llama breeder on the farm. Isabella is a student at Mighty Mountain School who is a local chess master. She is known for tapping her fingernails during chess games, which earned her the nickname "Los Dedos" (Spanish for "The Fingers"). At first, she is slightly snobby, as she is seen calling Brain "an amateur" after beating him at chess on numerous occasions. James MacDonald (voiced by Robert Naylor 2003; Jesse Camacho 2004–2006; Nicholas Wheeler-Hughes 2007–2009; London Angelis 2010; John Flemming 2012–2014; Christian Distefano 2014–2022) (not to be confused with James MacDonald the sound effects artist) is a white rabbit who wears glasses. He is usually shy and quiet. He is in Ms. Morgan's class at preschool, and has an older sister named Molly MacDonald. Molly MacDonald (voiced by Maggie Castle) is close friends with Binky. She is a white rabbit and a senior member of the Tough Customers. She became a bully herself after being bullied in preschool, which she later avoided after discovering she was being imitated by her younger brother James. She is good at giving advice but dislikes that everybody comes to her for it. She became friends with Arthur and D.W. and is an effective babysitter for the Tibble Twins. Molly