Tamuj

Tamuj is a high level cleric that had no interest in being Guard Captain. However a group he was adventuring with brought back a prisoner from their adventure. People in the town wanted to kill the creature with no due process so he took up a post at the watch building, making sure no one could kill the prisoner. It took a year for the justice system to catch up with the town and the Gnoll prisoner became friends with Tamuj.

So he keeps mostly to himself while keeping his position to make sure that the town never gets too squirley.