Margaret Rose "Moose" Pearson is the daughter of Lydia and Chuck Pearson and the younger sister of Pepper Ann. Her maternal grandparents are Grandpa Leo and Grandma Lillian.
A lot of people, including some of her relatives, mistake Moose for a boy due to her deep voice and tomboyish behaviors. However, this doesn't seem to bother her in the least.
Skateboarding is one of her hobbies, and she and her friend Crash do a lot of it. She also enjoys "Genetic Dozen" comics and playing with her Tundra Woman action figures. Her other interests include talking about her idol Evel Kineval, drinking Chill-Aide, and whatever Lydia happens to be making for dinner.