[Ren is in the middle of pouring their water, so he doesn't notice Shun's tiny danger signs and instead perks right up at the mention of the other guy with Duel Monsters.]

You mean the guy who can talk to Duel Monster spirits? [The guy who's name he never even learned so he's still talking about him in present tense...] Or is there someone else I should meet? I won't say anything about it around Fubuki-kun either way.