Madam Z. Nettles was a witch who lived in Topsham. She was apparently a mediocre witch, and could not remember incantations or mix potions. She took a Kwikspell course to improve her magical skills. According to a testimonial she wrote for the company, the course helped her to improve her skills, as she became the centre of attention at parties and friends begged her for the recipe of her Scintillation Solution.
- Harry Potter and the Chamber of Secrets (Mentioned only)