Which individual's title is directly associated with the United States Navy, retired?

The correct answer is the individual whose title directly references a rank within the United States Navy, and that is the title of Admiral Kevin Lunday. In the hierarchy of military ranks, "Admiral" is a high-ranking position in the Navy, typically indicating extensive experience and a significant leadership role. "Commander" and "Master Chief Petty Officer" are also ranks associated with the Navy, but they are not at the same level as "Admiral," which denotes a Flag Officer rank.

The term "Commandant General" refers to a position typically associated with the Coast Guard or Marine Corps, rather than the Navy specifically. Therefore, Admiral Kevin Lunday appropriately fits the requirement of having a title directly linked to the United States Navy, indicating his senior rank at the time of his service, even if retired.