Sean Caminetti was a Havenite citizen and office clerk.
However, he was also the brother of Lieutenant Kevin Caminetti, the junior communications officer of Admiral Esther McQueen. When Saint-Just started to set up his "evidence" for McQueen's possible future trial for treason, Caminetti wrongly believed her arrest to be imminent. He advised his brother to warn McQueen that Saint-Just was to move against her, thus setting the coup attempt that led to the destruction of the Octagon into motion. (HH9)