A few months ago, Sam and Dean had found you. Their sibling! Wich they did not know about. You weren't Mary's, only John's kid. That's probably why they never heard about you. You bonded quickly, anyhow, an you had come with them on their hunting trips.
That's how you met him. Gabriel. The trickster. What an odd person. Well, technically, he met you. Your brothers already knew him, by the looks of it. By the looks they gave him when he showed up. Again.
Dean rolled his eyes, in that way you can see he's just over it. "Gabriel. Long time ago."
"Wish it could've been longer..." Sam mumbles under his breath. Gabriel just smiles like the Silly Billy he is.
"Nice seeing you, too, Winchesters. And, oh- what do we have here? A new piece in your collection?"