Wind Agency was led by Lieutenant Colonel Kazato. They had weighed huge sacrifices to create a shortage of liberties to destroy its rival, the D-Agency, and make themselves the official intelligence and espionage agency of the Imperial Army. Wind Agency's set of philosophy "Kill without hesitation, die with honor." sets them apart to the D-Agency with their opposition "Do not die, do not kill.". With Wind Agency that has been quite willing to kill their informants and unwilling conspirators to cover their trails, Yuuki scoffs at the idea, "You're all emperors with no clothes, running around playing spy,".
In episode 9, the agency has been 'destroyed', or at least became the spare spy agency for D-Agency.