Blue Exorcist tells the story of Rin Okumura, a teenager who discovers he's the son of Satan, and decides to fight against his demonic heritage by becoming an exorcist. As he trains to protect humanity from the forces of darkness, Rin faces internal and external struggles that test his resolve and identity. With its mix of action, supernatural elements, and themes of redemption, this series is perfect for fans of Fullmetal Alchemist and The Seven Deadly Sins.