There's still a lot Roxas doesn't know about... having this body. What other conclusion could he have come to when all but one of his limbs abruptly ceased working? And due to the placement of the mark when it appeared, Roxas couldn't see it, so he only shakes his head, at a loss to explain.

"Maybe... I couldn't really check."

But if Ienzo is here, Roxas wouldn't be amiss having a chat with him about it, just in case. If he seems to be playing it suspiciously cool, he is. Roxas is NOT admitting in front of Riku how scary that had been.

There's also an unfair kind of irony in Ienzo being afflicted with illusions...

"Do you know where Ze- um, Ienzo is?"