Thaddeus Breamwell Greenholt was a Hufflepuff student during the era just after Grindelwald’s fall. After graduating, he spent decades traveling the world, studying magical creatures across Europe, Africa, and Asia. He published several modest but respected volumes, such as “Whispers of the Thestrals” and “The Humble Murtlap: A Friend to Healers.”

Now back at Hogwarts, he teaches Care of Magical Creatures with a gentler approach than Hagrid, focusing on the balance between safety and respect. He has been Head of Hufflepuff House for the last 12 years, where his office smells of tea and has shelves lined with terrariums of small magical critters....