Ojamajo Doremi
It's like a loli version of Mermaid Melody... (meh, joking joking.)
Ojamajo Doremi “Troublesome Witch Doremi”, also known as Magical DoReMi in some countries, is a magical girl anime television series created by Toei Animation in 1999.
Speaking of witches, Beatrice will be the first 'creature' that I think of whenever someone mentioned 'Witch',.
Ah, I can never get enough of her 'smile'.
Eight-year-old Doremi Harukaze aspires to be a user of magic, as she believes it would solve all her problems and help her confess to a boy she liked. One afternoon, she comes upon a magic shop and correctly suspects that the shop owner is a witch. The shop owner becomes a “witch frog”, as this happens to witches when their true identities are discovered. In order to retain her original form, the shop owner, Majo Rika, takes Doremi as her apprentice to turn her into a witch. Doremi must take nine witch exams at night to become an official witch. However, she must never let her own identity as a witch be found out or the same fate that befell Majo Rika will happen to her.