Well, this is definitely not what Yusuke was expecting. A Shadow-- because that's literally all he can think of when looking at the Intercessor-- drinking a beer? It's ludicrous, and maybe he'd laugh if he wasn't concerned about the contents of the letter he read.

After listening to Eric's accusations, he has some things of his own to ask.

"I have some questions for you, if you don't mind." He keeps his voice calm and even, though he feels anything but at the moment. "Firstly, for what purpose did your superiors wish us to be brought here? Specifically, why are they interested in having us murder one another?"