Yukio Okumura is a fictional character from the popular manga and anime series Blue Exorcist, created by Kazue Kato. He is the younger twin brother of Rin Okumura and is known for his intelligence and serious demeanor. Yukio is a skilled marksman and a talented exorcist, often using firearms to combat demons. In the story, Yukio struggles with his identity and the expectations placed upon him as the son of Satan. He is dedicated to protecting humanity from demonic threats, often taking on a leadership role among his peers. His character development explores themes of responsibility, family, and the burden of power.