Beezus Quimby is a fictional character from the children's book series created by Louise Fitzhugh. She is the older sister of Ramona Quimby, and the stories often explore their sibling relationship, highlighting the challenges and joys of growing up together. In the series, Beezus is portrayed as responsible and somewhat serious, often feeling frustrated by Ramona's mischievous behavior. The books capture the everyday adventures and conflicts between the sisters, showcasing themes of family, love, and understanding.