The Justicar are an order Knights, Soldiers, and Paladins that server the Justices. However they are in place for the use of the Justices they are led by one who wields the right to refuse any order from the Justices. The man that leads the Justicar is Sir Athos a Human Silver Half-Dragon.
One of the stipulations is that the leader of the Justicar need to worship Heronious. This will give him a good insight on what to accept from the Justices and what to refuse.