The Messenger Club

The Messenger Club (メッセンジャークラブ “Messenjākurabu”) is a tight-knit, organized group of young people, typically between the ages of at least 11 or older for actual Carriers, or 15 and older for Guardians (it is possible, upon turning 15, to be both a Carrier and a Guardian), most of whom have at least one parent in the Detective Agency and one in the Port Mafia, whose job it is to encode sensitive messages in a specific, special code which is unique to each member of the Club and up to them to create, and then deliver those messages safely to their intended recipient. They are protected by both the Detective Agency and Port Mafia, and therefore, no harm is allowed to come to them by anyone without very swift and serious retaliation from either or both sides. That said, all Messengers travel in groups of at least three when out on a job, especially when their job deals with information too sensitive to even be written down and thus must be memorized by those assigned to it. Some of their members do also belong to the Detective Agency or Port Mafia, but as long as they are on a job for the Club, their other allegiances are unimportant.