[There's silence as they stare up at him, critically assessing his expression for any hint of something he might be holding back-- something that indicates knowledge he never should've had.

He's perturbed, yes. But not devastated.

Worse damage could've been done.]

I wasn't. Not until I heard you speak. [The things he was saying- the voices that responded. They have to assume-]

The conversations you were having; I don't believe they were recent, or of this world.

You spoke of having died, among other things. [Stated as a fact, without a hint of the hysteria that Chara's voice had held on the Stone at that particular revelation. If anything, Chara may as well have said the weather was good- just something that's a norm in their life.]

Howdy, Chara! [Asriel chirps from one of the stones in their hands. They aren't even sure which one.] Smile for the camera!