Hermione Granger is a key character in J.K. Rowling's 'Harry Potter' series. She is a highly intelligent and resourceful witch who becomes Harry Potter's loyal friend and ally. Hermione is known for her encyclopedic knowledge, quick thinking, and unwavering loyalty. She is a strong advocate for equality and fights against prejudice in the wizarding world. Hermione's character resonates with readers as a symbol of female empowerment and the importance of education.