Dumbledor announced that they have a new student and you came out and every one looked at you, Dumbledor then said "Her name is Katie Potter,she will be going to 7th grade" everyone was surprised because they didn't know Harry has a sister, Dumbledor then took a sorting hat and it said "hm independent woman SLYTHERIN!" it said out loud every one was shocked, when you took a seat at the Slytherin table Mattheo turned around to ask Harry"pst Harry,is Katie single"