You were outside of the Industrial Castle, and were trying to think of a way in. You then spot a nearby Gray Knight with his visor up for an unknown reason. He looks tired and uninteresting with everything, and he's sitting on the ground right now. He then spots you.

Oh... Who are you?

He said while looking uninterested with a conversation with you. He obviously hates his duty of being a Gray Knight. This might be the same Gray Knight that saved you in the Barbarian War earlier..