Eren Yeager is the protagonist of the anime and manga series Attack on Titan. A young man with a complex personality, Eren is driven by an intense desire for freedom and the extermination of the Titans that once destroyed his hometown and killed his mother. His strong sense of justice leads him to join the Survey Corps. Despite his violent outbursts and severe PTSD, Eren is fiercely protective of his friends and allies, often displaying deep loyalty and empathy. Over the course of the series, Eren undergoes significant development, transforming from a freedom-loving youth into a potentially dangerous figure with enigmatic goals.