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 minor The Worst Witch characters
Miss Mould is an art teacher who is friendlier than Miss Hardbroom. She uses a lot of flowery language and can be quite melodramatic, telling the girls to "be one with the clay" and "get it under your fingernails". Miss Mould is also a very responsible and protective teacher, as seen when Mildred's pot turns into five rattlesnakes (later revealed to have been done by Ethel Hallow) when she springs into action and manages to get all of the girls out of the classroom.