Rubeus Hagrid
Harry and the Weasley family are joined by Rubeus Hagrid and Hermione Granger at a book-signing by Gilderoy Lockhart, who later announces he is Hogwarts' new Defence Against the Dark Arts teacher. Confronted by Draco Malfoy, Harry notices Malfoy's father, Lucius, slip a book into Ginny Weasley's cauldron. When Harry and Ron are blocked from entering Platform Nine and Three-Quarters at London King's Cross railway station, they take the flying car to Hogwarts; after crashing into the Whomping Willow and breaking Ron's wand, they receive detention.