Armors are a type of fiend in Final Fantasy X and Final Fantasy X-2. Its members have large bodies with short legs and long arms. They have high Defense thanks to their tough, armored hide, and plwnty of HP, making them difficult to kill. During battle, an Armor will eventually open its hide to prepare for a powerful attack, greatly lowering its Defense.
In Final Fantasy X-2 it takes 18 kills to Oversoul an Armor.