Quartermasters are senior players who have experience in LARPing and shared storytelling who have decided to have their characters be semi-agency characters. What this means is that for a few hours each event the Quartermasters will be focusing their characters interests on ensuring that other players, including other Quartermasters, are having a good time. The way this works is that for a 3 hour block Quartermasters work as the in-character guides and camera crew into combat zones for the players. The other option for Quartermaster players is an Interior Quartermaster period where Quartermasters can assist other players with crafting, social role-play, and moving interior game plot into the hands of other players (including other Quartermasters).
As a Quartermaster player you give up a little bit of agency but instead are ensuring that all of your friends who are also playing are having a great time.