Description

Shinya is a major general of Moon Demon Company and the adoptive brother of Shinoa. Although he has high capacity of spellcraft from since childhood, Shinya is not comfortable about being with the Hiiragi's. However, he is good friends with Guren who also holds the same intention against them.

Shinya is shown to be a very calm and somewhat gentle person, even when insulted or made fun of, especially compared to other members of the Hiiragi family. He warns Yuuichirou not to take what Kureto says at face value and dislikes picking on the weak.
He has been friends with Guren since their school days, and seems to enjoy picking on him, often by forcing Guren into awkward situations or simply annoying him.

[From Owari no Seraph Wiki]