Hmm. "Okay, but you gotta promise me that you'll explain it again someday! I'll get it next time, you'll see." Sora would have honestly called Mewtwo absolutely anything and nothing had they asked! He's pretty big on accepting things at face value.

"Really? You think?" Sora thinks about this for a moment. He'd say that he's only Sora he knows, but he knows better than that by now. There are always more Soras. "Maybe I just got one of those faces. Who were you thinking about?"

... And if this is looking like a discussion, Sora may sidle over to grab one of the folding chairs at the back of the gallery. He will gesture toward them, looking over at Mewtwo questioningly. "Hey, you wanna sit too?" He'll grab them both a chair if they're so willing!