Kyojin, meaning "Titan," refers to the giant humanoid beings that drive the conflict in Shingeki no Kyojin (Attack on Titan). They are not a single character but a major category of antagonistic entities in the series. Titans attack human settlements, consume people, and force humanity to live behind massive walls. As the story progresses, different kinds of Titans reveal deeper mysteries about the world, the origins of Titan power, and the true nature of the conflict at the heart of the series.