Overt sentiment has its place, and that place is mostly among humans. Which is the path that Anna chose.

Castiel has little time for it, particularly at a time such as this. But it seems as if some acknowledgment is called for.

"I am sorry."

He even means it, in part. Or rather, in many parts.

Sorry that she has to die. Sorry that he has to be the one to do it. Sorry that she Fell in the first place. Sorry that she has managed to bind Dean, who has already sustained enough damage, up in her death.