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 minor The Worst Witch characters
Miss Gribble is mentioned briefly in the fifth book of the series, The Worst Witch Saves the Day, where it is mentioned that she left after only one term after failing to maintain discipline with pupils.