It's impossible to know where this creature could have come from, who he was before he was what he is now, or if he perhaps has always been what he is; it's not as if Castiel has ever seen anything like him before, outside of his books, and fairy tales. What he is, or how he came to be that way.. it is a mystery.

He wants to keep his mouth shut, to not offer any sort of attention at all when he's angry and chafed, but he's too damned curious for his own good, can't help but want to know more about this strange, curious, dangerous creature, because he's an inquisitive thing, always has been, and likely always shall be.

".. will you tell me who you are?"