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
Griselda Blackwood makes her first (and only) appearance in the third book of the series where she is kidnapped by Mildred Hubble so Mildred can take her place at the Halloween celebrations.