Annie Hawkins

Annie Hawkins was a hunter friend of Sam, Dean and Bobby.

Background
She is a fellow hunter who knew the Winchesters and Bobby Singer. She managed to also sleep even one of them on different occasions. Annie investigated a haunted house and recieved a call from a ghost there asking to be freed. So Annie decides to call Sam and Dean in as she heads towards the house. At the house she discovers the bodies of a murdered couple, and moments later is killed herself.

She lingers in the house as a ghost and meets Bobby Singer there as a ghost as well.