Vergil the shiny Watchog, and Scout the Patrat: they make up the head of the Patrat Patrol. They both have a ton of other Patrat under their command, making up the bulk of their force.
You could actually say they're like a "rent-a-cop"- they're not actual police, as Tao Village has no real set of laws aside from "don't be a jerk." If you need someone to guard your house or your things while you're out, you pay one of these guys to guard for you.
They prefer dealing with Rescuers or Merchants above Rogues, as Rogues make them rather uneasy.
Original idea from this person's NPC suggestion: [link]