—Zed. Chief Zed was one of the founding members of the Men in Black, and the former Chief/Head of the MiB in all media forms. He ran the entire operation, and everyone answered to him. He was usually shown in his office, which is high above the main floor of the MiB Headquarters.
It was revealed that Zed died in 2012 due to unexplained causes; he was replaced as MIB director by Agent O. In MIB 3 it is revealed Zed's predecessor was someone known as Chief X whose personal secretary in 1969 was Agent O.
Zed explains that Edwards has a problem with authority but K responds that he does too, and also that Edwards earlier chased down an extremely fast alien on foot and that's got to be tough enough. Zed then takes all the officers to a room for an "eye exam", except Edwards who goes with K. Zed neuralyzes the other officers in the room.