Fort has nothing but unbridled contempt for the repulsive race known as humanity. They reap the abundant bounties of the seas while offering nothing but contamination in return. "It seems we have no choice but to rid ourselves of their ungrateful kind..." Fort's rage spreads to the dragons, causing them to rampage across the waves. Compared to the great floods that wiped out nearly all of humanity in ages past, this calamity is on an even greater scale.
Overseer is one who keeps watch over and directs the work of others.