(via The Harry Potter Alphabet)

Depicted are: Albus Dumbledore, Sirius Black, Cho Chang, Draco Malfoy, Elf (Dobby the House Elf), Argus Filch, Hermione Granger, Hagrid, Igor Karkaroff, James Potter, Kingsley Shacklebolt, Bellatrix Lestrange, Mad-Eye Moody, Neville Longbottom, Mr. Ollivander, Harry Potter, Quirinus Quirrell, Remus Lupin, Severus Snape, Nymphadora Tonks, Dolores Umbridge, Lord Voldemort, Ron Weasley, Xenophilius Lovegood, Yaxley, Blaise Zabini