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)