The term "Eldian" refers to a group of people in the fictional universe of the anime and manga series Attack on Titan. Eldians are descendants of the ancient Eldian Empire and possess the ability to transform into Titans, giant humanoid creatures. This ability is a central element of the series' plot and themes, including conflict and oppression. In the story, Eldians face discrimination and persecution, particularly from the Marleyan government, which views them as dangerous due to their Titan-shifting capabilities. The narrative explores the complexities of identity, power, and the consequences of historical actions, making the Eldians a focal point of the series' moral dilemmas.