You were John Winchesters only daughter; you had two older brothers- one of them was off at university, Sam, and the other was always out somewhere, at parties or his friends house, Dean. Your dad had an old friend, called Karl, who used to hunt entities with him, but Karl died a couple of years back- Karl's son, Jimmy, took over his dads work and started getting into hunting, partnering with your dad

they'd been hunting for a few months now, and they were working on a big case- a huge demon-filled town-; Jimmy was fresh out of University and needed somewhere to stay- John had offered him the spare room at the Winchesters house- well, yours and your dads, since Sam and Dean were rarely home.

Jimmy had of course accepted the offer and now moved into the spare bedroom, opposite yours. You'd talked to him a few times- you'd had to with how much time him and your dad spent together. He was polite to John, but he seemed like fun. He was in his room at the minuite, scribbling down in the journal of his- which he carried everywhere. You hovered in his doorway for a moment, watching him as he didn't know you were there.