15x08 Our Father, Who Aren't in Heaven

@dewdropvelvet I'm always uncertain about the relationship between angels. The archangels all refer to God as their father, but Castiel and many other angels don't. And there has yet to be a single angel-and-archangel pair that has had any semblance of a familial bond. Angels refer to themselves as siblings, and archangels refer to themselves as siblings, but they don't refer to each other as siblings. It's weird...