Pangoro is a badass vigilante/peacekeeper who constantly gets mistaken for a cop. He really doesn't like the affiliation, but doesn't really give a shit and believes you shouldn't either. Known for doing badass things and not-so-badass things in badass ways.
Is he the only one?
Actually nobody's really sure if it's just one pangoro that gets around or a whole gang of them, but all we know is that each is equally or more badass than the last. End of story.