The Guardians of Smoke was the most sought after position, the position itself was being the personal guard to a God or Goddess. Every God or Goddess gets one guardian until that guardian dies, the God or Goddess can not change or trade their guardian but guardian's not bearing their God or Goddess mark can be requested by other Gods or Goddesses with permission of the guardian's deity. In reality this wasn't a common situation since a guardian without a mark means that they have been rejected by their deity and are worthless.