Yukio Okumura is one of the main protagonists in Ao no Exorcist. He is also Rin's younger twin brother. A straight arrow and kind-hearted by nature, his goal is to become a doctor. Unbeknownst to his brother, he is a brilliant exorcist - the youngest in history - in short, a genius. His abilities are gradually unveiled during his time at the Exorcism Cram School.
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