Sora pops his head up a little bit to watch them leave, but then goes back to resting on his arms, staring into space a little. Just vibing until Soldat gets back. He figures they'll have an answer, and when they come back and set that stone down, Sora slaps his hand on top right away, confident that this will at least give context.

And it does. At least a bit. "That must have been confusing. No memories, nothing to work with. But something still didn't feel right, right?" Sora isn't saying this like he knows the answer. He doesn't, he's still tossing spare thoughts in the air! No, it's just sort of a... reevaluation. Getting them to walk him through the strange anxiety.