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 All at Sea" she sneakily brings Tabby, her bumbling tabby cat along to Grim Cove with her, instead of her new, ordinary black cat Ebony.