While Ronon is a Runner, he goes to a world that he knows is deserted, one that's known as a Runners' World, and is horrified to find a kid there: deaged Xander, who can't or won't speak for whatever reason. Ronon tries to send him to/drop him off at an inhabited world, but he won't go, just follows Ronon around and occasionally kicks wraith ass. And refuses to leave his axe behind even though he can barely lift it.