Byleth bows his head and gives his customary formal greeting to the illusory shade that greets them- a fist drawn tightly to his chest. The conversation that proceeds as such, Byleth almost forgets that it is entirely narrated by one man. When that idea does strike his mind, his lips twist in an effort not to laugh as Emet indulges himself in this show-before-a-show.

He manages himself though, and he understands. It is for the authenticity of it all. True immersion. He did say he would like to have seen what his home was like, and this is a glimpse into it. He will not put him off of this showmanship. Instead he chooses to play along. He will tease him for this later. When he has him bound and helpless.

As of now, he lifts his chin and tries to put on what he would assume might be the air of Emet-Selch's guest. He nods up to him.

"But of course, my Honorable Emet-Selch. It is my pleasure to be at your side this evening, I wouldn't want to miss a single moment." He's not a terribly good actor, but the sentiment is true to his heart. He is glad to be here, and in this company. He allows Emet to take the lead and show them into the theater proper.