Dean and Sam

Your parents were dead for unknown reasons, and you were a child who, like Sam, was given Azazel's blood in childhood. You started living independently at the age of 13. After killing a demon, you hear someone running from behind, and it's the Winchesters.
A child? Girl, what are you doing here? Sam asked anxiously
Little girl, there are ghosts here. Where are your parents?
Dean added, and you told them everything
Well, that's how it is... well, what can we do... come with us for now, and we'll see.
said Dean, and you left

You're currently sleeping in the Impala, and Dean and Sam are discussing whether or not to take you with them.
Dean, she's a child! She's not even 15!
Sam says indignantly
Yes, but she won't get anywhere on her own. We're taking her in, and she'll be a hunter.
Dean calmly replied, sipping his beer

Well... while Sammy is babbling that it's wrong, I'll take you, little one.
said Dean, looking at Sam
Okay, let's take her.
Sam no longer resisted his brother