Y/n is a hunter who lives with Sam and Dean. The readers mother died in a hunt and made Sam and Dean swear to take care of her. A few years after her mother died the reader got seriously injured in a hunt which made the boys ban her from hunting so shes their research girl now. The boys never told Y/n that they had a demon chained up in the bunker and one day while looking for some files she finds Crowley and they start talking.