Yukio Okumura is a central character in the anime series Ao no Exorcist (Blue Exorcist). He is the younger twin brother of Rin Okumura, the series' protagonist. Despite his younger age, Yukio is a prodigy and already a teacher at the True Cross Academy, where he instructs exorcist classes. Unlike his brother, Yukio has no demonic powers, but he possesses exceptional intelligence and marksmanship skills. He struggles with feelings of inadequacy and the burden of protecting his older brother, which adds depth to his complex character arc throughout the series.