Sam and Dean find a girl who could be the answer to all their problems and help stop the impending apocalypse. Begins at the end of season 4/start of season 5. Side story Origin: Lacey's Summer Vacation after chapter 44. Dean/OC.

The life of a hunter requires great sacrifice. Melody Winchester must learn that lesson the hard way and it nearly consumes and breaks apart her and her small family. But...what happens when she meets a certain angel? Will he change her perspective? Give her a new purpose? Or will his presence just tear apart everything she holds dear?

What happens when Sam and Dean have an adopted sister.

As the Impala, she's always been there for Dean and Sam. Now Baby needs her boys to be there for her when she's suddenly human again. Sequel to the events of "Home Is Where My Baby Is." AU Season 9 timeline.

You want to see what happened when a Winchester girl is thrown into the mix. Sam and dean have a 17 year old sister she's been going to school back in their home down but at a collage party the sib's are reunited. i hope i do my fellow SPN fans justice :

When a teenage girl with psychic abilities escapes from her abusive home with the help of the Winchester brothers, she soon encounters a world full of monsters, demons, ghosts, and angels. Everything seems to be going fantastic until an obnoxious angel takes interest in her. Gabriel/OC

Sam and Dean cross paths with two hunters unlike any they have ever met before; two sister, Taralynn and Ashlynn Harper. As they continue to have run-ins with the girls and learn more about them, they find the girls have more in common with them than they could have ever dreamed.

Abigail is Sam and Dean's cousin. There are secrets about her that will soon be revealed. Starts in season two and progresses from there. Changed my mind no CastielxOC that's just weird. But there will be eventual romance

Meg, a 15 year old girl part of the gang Demons, was perfectly content with her sadistic nature and the criminal activity she and her companions took part in. However, once she faces a situation she never thought she would, her entire existence is questioned as she asks herself what purpose in life she serves. [MegxCastiel, real-world de-aged AU. no smut]

Sam and Dean have a new addition to their small family, and she's something they never saw coming...

What if Sam and Dean had a younger sister, Alexa? Would she be as good of a hunter as her older brothers? Or will things turn out for the worst for the youngest Winchester? Sister!fic

Sisfic, Sam and Dean find out that they have a little sister. She's on the run from the law for murdering her adoptive parents, after she turned to drugs as an escape from the life of abuse that came with them. Can they help the girl who seems too far gone to be saved?

Dean, Sam and Lexi Winchester are on a hunt. While on these hunt, what can go wrong? For the Winchesters a lot can happen. Follow them on there journey.

Lexi Haile was a survivor, long before she was a Hunter, and that doesn't change when she ends up in Purgatory. She's faced down the world's most horrifying beasts but nothing scares her more than opening herself up to someone else. Will she take the risk when she meets Dean Winchester, the one who could change everything? Or will she push him away to protect herself from pain?

While on the trail of the Werewolf Alpha, Sam and Dean encounter a hunter named Mercy, who has a deep secret that puts them all in danger. Takes place in season six.

Madison Singer is Bobby's daughter Deans ex and Sam's best friend, they have a falling out and this is how she deals with it and what happens when the boys find her.

Sisfic. Max deals with the reunion of her family, as well as her troubled personal life, along with her older brother and best friend Dean and her twin brother Sam, while they search for their missing father, hunting and killing the supernatural along the way. Set in season one, mostly follows the series. (edited by winchestergirl67) - {on a break}

He hides in the trees watching her. Waiting. Many have gone in hunting the Tall Man but very few come out. Those who do come out are off their rocker and get sent straight to the crazy house. He is her nightmare. Living in the woods. Waiting. The old woman told her someone was coming to help her, but can anyone really help?

Cassandra and Charlotte are twins but are very different. Charlotte likes rock music, Cassandra likes pop music. Charlotte can hack a computer in under two minutes, Cassandra can pick locks like nobody's business. Charlotte is a whiz with guns, Cassandra is genius when it comes to hand to hand combat. Who are they? Dean Winchester's daughters of course.

She was found on a motel door step by the Winchesters and raised by a psychic. Neither side of her blood would ever accept her. She was half of a race that called her an abomination and wanted her dead, and half of a race that would stick needles and run tests on her if they ever found out. When threatened to lose the only family she ever really had, she did all she could do, run.

My name is Clara Walsh. My father was taken by a demon. He sold his soul to save me... I didn't even know he believed in that kind of thing. Now I'm alone and dropped into the middle of the hunting world. My only entertainment; The Winchesters. They should really tell you not to get close to people in this life... that was my mistake.

One shot about Leah Marie finding her strength. Uses the sister from my story Leah Marie but can be read on it's own. Complete.

Castiel finds a new friend, and is eager to show Sam and Dean.

The night that Mary Winchester died, a baby girl was born.

Rylee was blessed with a miracle...so the Angel says. She believes it could be a curse. When Dean and Sam cross paths with this hunter, they don't know what to think of her mysterious past, or her mysterious powers. Set during season 4 and advances to season 5 and on. Dean/OC

In the cookie of life, sisters are the chocolate chips. For Dean and Sam having their older sister Michelle around was having someone to lean on, someone to count on and someone to tell on. Follow the pre-series of the Winchester siblings and what it means to be a sister. Complete.

Bela Talbot's thoughts as she is dying; remembering a girl called Abby who made a deal with a demon on a rusty swing when she was fourteen years old. Rated T just to be absoloutley safe.

She was at peace. She smiled as the sun warmed her skin and a slight breeze kept her cool despite the summer heat. The waves lapped at her feet as the tide came in and she giggled to herself. Paradise, she was in paradise. This is a one shot about where I would want Meg to go after Crowley killed her. Mentions of Megstiel. Enjoy!

Seventeen year old Dean is reaped and is a tribute from district 12. He leaves behind 13 year old Sam as he goes into the hunger games where he will meet Castiel, a young boy that just wants to die but now Dean has met him he wont let that happen. As every second passes with Dean's alliance he has with Castiel, will he fall in love? And what will he do to survive?

While working on a case. Sam and Dean run into a strange girl who doesn't seem to be telling them the whole truth. And when she brings up a certain family member. Things get even more confusing. Dean/OC

What if Sam and Dean had an adopted sister? Part two of the series.

What if Sam and Dean had an adopted sister? This is part one in a three part series.