He picked up on the discomfort, but his initial worry was just that he'd overstepped and Ed wasn't open to discussing that part of him at all. Or perhaps he had more practical talents, and took Akihiko's question as dismissive? He didn't quite regard Personas and Shadows as magic either, since they just.. are sentient to an extent, but it's been a learning curve on how to explain them and the new skills he's learning exist. He's relieved when Edward answers, brow briefly raising in thought at the explanation.

There's no attempt to hide the wonder in his expression at the trick. He leans forward to look at the little depression that was left before following it up to the spear, almost reaching out to touch it as if to see if it's real before catching his hand. He grins as he straightens back up.

"Dang- doesn't that mean you can basically make anything with the right setup? That's incredible!" He shakes his head with a smile. "I'd love to hear the basics about how it works when we aren't about to go on an expedition." Akihiko didn't forget it was a science- he's sure any actual depth of understanding would take much longer than a chat to get, but damn if it wasn't cool.