Age: 15 Birthday: December 27 Hair: Brown (Manga and Anime) Eyes: Teal Height: 180 cm (5' 11") Weight: 70 kg (154 lbs) Blood: Type O Pastimes and talents: Formulating plans and reading Jump Square every month Average hours of sleep per night: 4 Favorite foods: Seafood (especially sashimi) Favorite manga genres: Comedy, horror, suspense Favorite type of girl: ... Yukio is Rin's younger, fraternal twin brother. A straight arrow and kind-hearted by nature, he is the youngest person to ever pass the Exorcist qualification exam, attaining a Meister in Doctor and Dragoon, and later becomes a teacher at True Cross Academy, where he ironically ends up teaching his older brother in the ways of the Exorcist. (Source: Ao no Exorcist Wikia)