Cross Guild

The Cross Guild is a powerful organization headlined by three former members of the Seven Warlords of the Sea: Buggy, Dracule Mihawk, and Crocodile, with Buggy, now one of the Four Emperors, recognized as the leader.

Overview
Not much is currently known about how the group was formed. It appeared to have been created following the end of the Levely, when the Seven Warlords system was disbanded and Buggy and Mihawk became wanted criminals again. Buggy was named as one of the new Four Emperors around the same time this group was created, and Trafalgar Law noted that gaining followers of Mihawk and Crocodile's caliber certainly warranted this.

The Cross Guild is able to use their battle might and political influence to issue bounties on Marines, an initiative which appears to be working as indicated by it being reported on in the newspapers.