Harry Potter and the Goblet of Fire
Professor: Care of Magical Creatures Substitute Teacher
When Hagrid refuses to teach for a time out of shame at Rita Skeeter's article, Professor Dumbledore invites substitute teacher Grubbly-Plank. She is an excellent Care of Magical Creatures instructor, and she provides Hagrid's class with a lovely introduction to unicorns. But Harry is totally loyal to Hagrid and can't stand Grubbly-Plank.