What happens when Dean, and Sam Winchester find out they have a sister who isn't exactly human, and has a lot of secrets

TW: SELF HARM IS DEPICTED. DO NOT READ IF EASILY TRIGGERED. It is acted out in one of the chapters, when it's up I'll put a warning at the beginning so it can be skipped over and add a summary of what happened at the start of the next chapter. Also if you need help or distractions for ANY mental illnesses or behaviors please text GO to 741741. I've done it several times and they're really great people. Casey is Sam and Dean's younger sister. She's 15 years old, 10 years younger than Sam and 14 from Dean, and has been on the hunt with the boys her entire life, but struggles with depression and is currently in a battle with self harm, but the boys don't know and she's terrified for them to find out. Will they lock her up? Will Dean scream at her? She hopes she doesn't find out... Thank you all so much for reading and making this possible! Because of all of you, our best ratings are: #21 in Castiel #13 in Supernatural #3 in Winchester #3 in Dean #2 in SisterWinchester and [drumroll] #1 IN SAMWINCHESTER and in IMAGINE!!!!! THANK YOU SO MUCH!! Please keep reading, voting, and commenting! I read all of your comments (even the small lols and the omgs) and they mean so much to me and make me so happy! I love you and thank you for reading my babbling.

Sam and Dean,grew up hunting demons and more. But one day there father comes home with a 11 year old girl and told them that this was there sister. Sam and dean couldn't believe what there father had told them. But it wasn't before long she wanted to join along side her brothers. But what they don't know is Riley has a secret she is keeping from everyone. "Will she get brave and tell or will she hide behind the mask of a scared child."

Wait we have a sister?

"Supernatural's not real. It's just a book."

Ella Winchester is the youngest of the Winchester siblings. She grows up surrounded by the supernatural. Raised by her father John Winchester to be a hunter along side her two big brothers Dean and Sam. Author's Note: This story is my own spin on the Supernatural show with the addition of the little Winchester sister named, Ella. Her full name is: Isabella Mary Hope Winchester, but she prefers everyone to call her Ella or El or Elle. I plan on including some of the original story line and episodes from the show, but I will put my own twist on them in order to include the character I created Ella Winchester. I will also be creating new story lines that are not found in the Supernatural show to keep things interesting while staying true to the original characters. This is my first fanfic ever, so please go easy on me. I am creating this fanfic just for fun. Thank you in advance to anyone that takes the time to read this. I do not own or claim to own the Supernatural show storyline & any of the characters from the show. I do however claim to own the character I created Ella Winchester(aka Isabella Mary Hope Winchester) and any other new characters I created specifically in my, "Light in the Darkness Supernatural fanfic" that are not originally from the Supernatural show. I am just making this fanfic for fun. I am also making it for others to read and enjoy. This is what I imagine it would be like if Dean and Sam had a little sister.