His given name, Otoya (音也), contains the Japanese character for sound (音).
In the game, he is the one with acrophobia, unlike in the anime, where Kurusu Syo is the one afflicted.
Even though he has a rosary, he states that he is not a Catholic.
In Debut, he revealed that he now knows that Shining Saotome is actually his father, and that he is a child out of wedlock. [1]
Otoya is seen to be very acrobatic, along with Syo.
In the Radio Drama for All Star, Otoya states that he enjoys soccer, using the balance ball, and the lifting test in soccer.
He shows no preference between summer (warm months) and winter (cold months).[2]
He is an illegitimate child.
His favorite food is curry, but he dislikes green peppers and black coffee