See, I wondered, when the king just called for Guildenstern and the stage directions say “Enter Rosencrantz and Guildenstern” if this was just an editorial decision to include Rosencrantz. But then I read this line, in which it feels fairly clear that the king is now speaking to them both – and is purposefully including Rosencrantz, when he ignored him earlier. Or maybe it’s not that Guildenstern is preferred by the King. Maybe it’s that they are so quick to enter that the King doesn’t have time to call for Rosencrantz. They’re so fast, they spare him the call. But even if that is so, the king STILL calls Guildenstern first. And Rosencrantz appears with him.