The Worst Witch
Mildred "Millie" Hubble is the protagonist of the series. She is a good-hearted, but bungling young witch-in-training, who never seems to get anything right. She is friends with Maud Spellbody and Enid Nightshade and has a strong rivalry with Ethel Hallow. It is Miss Hardbroom, her potions teacher, who calls her "The Worst Witch".
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.