Fourth Steward Greens was the one to formally surrender the city of Marchford to Catherine, by virtue of being the highest ranked person not evacuated from the city.
As fourth steward, he was in charge of the latrines of Marchford Manor. He was temporarily acting as governor because everyone else of any import, even as low as the first three ranks of steward, had already evacuated the city after the Battle of Three Hills in order to escape the Fifteenth Legion when they took Marchford.