Hi this is my new supernatural story. There are few things you need to know.
When Sam was 15 he found a baby on the outside of the motel which strangely like him.
The baby is a nephilim
She also is the daughter of Gabriel.
She was created by Gabriel to help stop the apocalypse
She grows like a human baby
When Sam left for Stanford she went with him.
As she grows older her personally becomes a lot like Dean's which freaks out Sam.