The Winchesters; Angel on my shoulder (Supernatural FanFic)

Growing up as a hunter, all Alyssa wanted to do was be normal, to go to school, and gossip about boys with her friends. Instead, she was thrown into training to be a hunter, like her parents and they're parents before that.
When she watches her house burn down and her family killed, she has to be able to defend herself. With the help of Cass and the winchester's, she finds out what really happened that horrible night but not before helping castiel and the winchesters deal with their own problems first.