Shadows of Evil
Can you swing a sword? Can you take a hit? Can you drink until dawn? Then the Miheisto is for you. The only defining characteristic of the Miheisto is that they have a numeral system for gauging how much sway someone has, want more power? Off the higher ups if you can or dare. Their sigil changes from battle to battle to confer how much authority one may have in the organization. Though even that is superficial, Causes great enough to move the Miheisto to great numbers rarely required direct leadership. Nor do the people on top make a big deal about their status until they are threatened or are asked by another band of Miheisto to join ranks for a cause.
Whenever someone of great renown dies in combat or otherwise, the Miheisto from a 100 mile radius are required to attend the funeral.