There are five great gangs that are spread out in the country. These major groups are big enough not to be called just "gangs", more appropriately, they should be called "clans" instead.
Why?
It's because their roots originated before modern times. Spirits have been known since the first record of history. Big families monopolized these records not to let the public know, or else, they would have less power.
The surface world's governments began forming. They are the ruler of the common people in the eyes of the big families, thus, they were nemeses. Slowly, as time enters the modern period, the government gets a hold of a great pile of information about Spirits and their existence.
