The Judge it is Venice's chief magistrate, administering justice from his courthouse and office in the Outer City. He is the representative of The Doge and the City Council in matters of law and order, though he may confess, in unguarded moments, that the Doge doesn't seem to be paying a lot of attention to city administration lately.
If Scarlett should transgress the law (such as getting seen looting a Citizen's house, or attacking or killing a Citizen), she will need to report to the Judge to pay a fine (otherwise, guard captains, city officials, and the City Council will refuse to deal with her, until the fine is paid.)
It might come as a surprise, therefore, that the Judge does not seem to mind if Scarlett drinks from the Judge's tea pot or steals items from the courthouse, such as the poster, a piece of bread, or even the contents of his urban chest.
The judge sits at his bench in the Courtroom, 24 hours a day. Because crime never sleeps, either. (Click on map to enlarge.)