Mildred Hubble is the main character in the children's book series "The Worst Witch," written by Jill Murphy. She is a young witch who attends Miss Cackle's Academy for Witches, where she often finds herself in humorous and challenging situations due to her clumsiness and lack of magical talent. Despite her struggles, Mildred is kind-hearted and determined. Throughout the series, Mildred faces various adventures alongside her friends, including Maud and Enid. The stories highlight themes of friendship, perseverance, and self-acceptance, making Mildred a relatable character for young readers. Her journey emphasizes that it's okay to be different and that everyone has their own strengths.