Mildred Hubble
Mildred Hubble is a major character in "The Worst Witch" children's book series by Jill Murphy. She is the protagonist in all the books. She is friends with Maud Spellbody and Enid Nightshade and has a strong rivalry with Ethel Hallow and Drusilla Paddock.
List of The Worst Witch characters
In "The Worst Witch Saves the Day" she once again saves the academy from the ruthless Agatha Cackle (who sneaked into the school disguised as a new teacher Miss Granite, with a high-pitched, squeaky voice, a huge cloud of orange curls, and an extremely bizarre personality) who tried to turn the whole academy into snails.