<< You're an Angel in a non-registred vessel. >>

You, an important angel, changed vessel without any warning, choosing a more young one not get outta troubles with the apocalypse and etc. It was strange for an angel of your level to wear just a young vessel, but who cares? You thought you could life it off as normal, but one day Zacarías caught you.

He let you at the care of the Winchester's, Cass and Bobby, because he needed them to watch over you for some days.. Castiel joined in because well.. He didn't know you were an angel, no one did in general because- Zacarías didn't say a shit about you being an angel, he just said "Take care of this kid for some days." An then he popped off, as angels and demon's usually do.

In the actually, you're watching how Dean and Sam got drunk in Bobby's house, with some beer all while Castiel just watched over you, not wanting to get drunk this night. You were just watching Bobby do his research about Zacarías and the thing of the "true battle" of the apocalypse.