The Admirals (and Fleet Admiral) are the highest-ranked officers in the Navy. They, above all, are supposed to embody the Marines' strong desire for justice in the One Piece world. They also provide unquestioning loyalty to the Celestial Dragons of the World Government, even if their desires contradict the pursuit of justice. Being one of these men means having a firm moral compass, devotion, and absolute power. These qualifications should make them strict and uncompromising, especially toward the pirates the Navy regularly hunts down.
Source：https://www.cbr.com/one-piece-admirals-who-dont-like-the-navy/
