The Cadet, also known as Officer, is an enemy in Final Fantasy VI. It only appears in South Figaro during Locke's scenario, and are fought by speaking to the green-armored soldiers wandering around town.
They only use physical attacks and are not difficult to defeat. The true purpose for fighting the Cadets is to Steal their clothing, resulting in Locke donning an Imperial uniform and being able to bypass certain soldiers. It should be noted that although they are fought, they have no in-game bestiary entry.