This is a lot of stuff to come back to. I know it's not very many posts, but they are long and in depth. Well, Guan Yu's are. As I see it, Lord Dun is trying to grasp at anything he can to stand up to Yu's words. I'm not saying he's scum but his story just seems to be made up as he goes.

Why would you call your role useless? Being able to save someone who we know is Innocent, or have an important role, like Cao Cao seems to be pretty beneficial to me.