Harry Potter and the Half-Blood Prince
House: Hufflepuff, 6th Year
Zacharias is on the Hufflepuff Quidditch team. His rude and obnoxious commentary during the Gryffindor vs. Slytherin Quidditch game incites much ill will from Gryffindor, culminating with Ginny Weasley deliberately running into him at the end of the game. He was a member of Dumbledore's Army (found in Book 5, Harry Potter and the Order of the Phoenix), a group formed by Hermione and Harry when, in the year prior, the practice of magic was banned at Hogwarts by Dolores Umbridge. However, Zacharias was always a bit annoying.