[@LadyRunic] I have an idea but I think I should run it by you before going to the trouble of writing a CS.

I think I'd be right in saying that while the courts are civil to each other relations are tense and civility is simply a pretense. I was thinking of a wanderer type character. One who owes no loyalties to any of the courts and as such can traverse them free of political strife and so is able to carry messages and the like over the boarders.