[Castiel pauses, fidgets, falters just shy of saying something. He is stubborn and he used to have an iron will, but the truth is plucked from the core of his fragmented mind more easily than he feels comfortable with. He is growing to dislike this week, too.]

For what, what little it's worth, Dean, I am sorry for destroying everything. I know I, I only served part of the purpose for having been brought back.

[It's why he was brought back, to fix his messes. Fix Sam, fix Dean, fix the Leviathans, fix himself if necessary. His fingers twitch in the grass. He's restless, wants to take flight and has trouble not giving in to the desire. He shies away from conflict, and truth? That has a tendency to stir conflict between him and Dean, rightfully so.]