The boy's eyes widen as he glances down at his hand, and... of all things, he cradles it in the other protectively, of all things. Probably the single most vulnerable gesture that Damian has willingly made in the last... whatever. At least as long as Kyle has known him.

"Frontier," he says only, instead. "But you know what's everywhere, do you not."

Not quite a question.

It has been what humans do. Push the frontiers, push the limits. Discover what's beyond the next mountain. He's not sure about alien races, but he suspects many of them are that way.

But Rayner... Rayner is something else. Has been. Is, here?