Supernatural Diaries of Oli Smith.

Olivia "Oli" Smith has known about the things that go bump in the night since she was a kid. She was raised by her "Uncle" Bobby after her mother passed away which caused her father to commit suicide shortly after. Oli has learned all there is to know about the things that create nightmares for children and have since then been hunting all the evil in the world.

Oli has been sent by Uncle Bobby to find his old friend John Winchester in Jericho, California.

DISCLAIMER: Only Oli is my only character but this story is closely related to the show. You will see some very similar things from the show.