Lily Trotter is a fictional character from the children's book series created by M. E. Kerr. She is known for her adventurous spirit and curiosity about the world around her. The stories often explore themes of friendship, family, and self-discovery, making her relatable to young readers. In the series, Lily navigates various challenges and experiences that help her grow. Her character is often accompanied by her friends and family, who play significant roles in her adventures. The books aim to inspire children to embrace their individuality and face life's ups and downs with courage.