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
In the TV series, Egbert Hellibore was portrayed by Terrence Hardiman. He is often referred to as "Helliboring" in the TV series.