[ Castiel's eyes narrow, confusion etching itself deeply into his features as he tries to make sense of what Aziraphale is saying. ]

They don't... just get bodies. If anything, archangels are more limited in choice of vessels. They burn through unsuitable ones fast.

[ And then his eyes widen a little, not just confused but borderline shocked. His expression doesn't seem to change much; the eyes tell a lot however in reading him as he processes the information. ]

That body you have. It's not a vessel.... it's... yours?