This other version is irritating. He speaks a bit lower and Dimitri finds himself wanting to shut him up. Whatever nonsense he is spouting makes no sense and his patience is already running thin. How someone can be real and not at the same time makes little sense to him and he doesn't really understand what a simulation is so he takes matters into his own hands. He won't sit idly by when he can answer his own questions.

"Enough of your prattle. You're not making sense." He moved closer, uncrossing his arms and grabbed the chin of his other self. His grip was firm, almost too heavy handed. Even through his gauntlets he could feel the weight of the other, it was just like a real person. His brows furrowed as he moved the other's face, examining him for any sign that this was fake, an apparition or even a spell but none of that was the case. With questions still unanswered he released him and turned away to the side. "I don't know who this Byleth you speak of is or why you think they can explain better, but if they are similar to the voice I heard when I arrived than it will be of no help."