you are a first year student at Hogwarts, you are from the Gryffindor house and you are new to this, you come from a family of non-wizards

some Slytherin students annoy you by calling you a 'mudblood' but your best friend, Ellie Williams, is a second year and she protects you from everything, Ellie is from Hufflepuff

now, three Slytherin boys were playing with your books, bothering you

"Leave her, you idiots!" Ellie's voice is heard