You're walking down the halls past other rooms (which you have been in before), looking for someone new.

And then you notice a large oak door. A gold-and-red door knocker hangs untouched in front of you. Gryffindor, of course. But the you notice a poster under the knocker: Ravenclaw. What could this mean?

You touch your hand to the doorknob, but a deep, foreboding voice seems to echo inside your head—"Knock before you enter."
Oh, sure, of course. You do so, and find yourself in a large room. The walls are a shade of midnight blue, but the trim is gold. My Chemical Romance, Gryffindor, and Ravenclaw posters hang from the walls, framed. Bookshelves sit under these posters, filled with Harry Potter, Percy Jackson, The Chronicles of Narnia, Inkheart, Hunger Games. A PS3 lays on the floor, accompanied by a flat-screen and six blue and red beanbags. A bronze snack cabinet is suspended above the gaming area, filled with delicious, heart-attacking snacks. The large window on the only wall not covered with posters draws your attention to the four poster bed. These signs could only mean one thing:

This girl is a Gryffinclaw.