7th Division

The 7th Division maintains peace between Seireitei and Rukongai. They make sure shinigami don't go causing chaos in Seireitei, and are completely responsible for keeping Rukongai civil... or at least the area closest to Seireitei. When souls have complaints/suggestions/questions/etc, whatever, they send is sent to the 7th Division where it is read, ignored, taken into consideration, and decided upon. They often act on their own, but also work with various other divisions.