There’s not a speck of angel in you, is there?
Maybe just a speck.
This scene doesn’t get talked about enough. This badass motherfucker hauled himself out of a hospital bed where he was experiencing human pain for the first time, crossed the country on a bus by himself, travelling without his wings, burst in at the last minute, falls on his knees vomiting blood, then jumps to his feet and promptly saves the Winchesters’ asses by cutting off Pestilence’s finger, with a snappy one liner to boot. This is one of the most badass things Cas has ever done.
Not to mention in one episode he carves an Angel Banishment symbol into his fuckin’ chest to save the Winchester’s ass/buy them time, and he uses a Demons body to get out of ring of holy fire! He can be a Baby in a Trench-coat, but he’s also a BADASS with Wings!