A Sentinel (防人, Sakimori) is a title given to a young maiden in Yuusha De Aru franchise who was once a hero candidate and had the truth about the world beyond the wall revealed to them and were ordered to investigate the outside by the command of Taisha. They are armed with battle suit, gun and shield depending on the role of gunner or defender. Some Sentinel also has the Mankai ability like the Hero.
