Expedition Leaders, usually Aces, command an Exploration Team. Depending on the campaign setup, either every player is an Expedition Leader, with their own Teams, or the rest form the members of one player's Team. In a Mystery Dungeon setting, Expedition Leaders have fairly wide authority and varied specializations and goals from one another, pursing their own goals either with their own Team, or as part of (or possibly leading outright) an Explorer or Rescue Guild.