Race: Human

Age: 24

Birthday: November 22, 1996

Height: 183 cm (6'0")

Weight: 62 kg (137 lbs)

Blood type: B

Rank: Major General

Section: Moon Demon Company

Affiliation: Japanese Imperial Demon Army

Demon Weapon Series: Black Demon Series

Demon: Byakkomaru

Shinya is the Major General of the Japanese Imperial Demon Army. He is shown to be a very calm and somewhat gentle person. He has been friends with Guren since their school days and cares about him, even though he seems to enjoy picking on him, often by forcing Guren into awkward situations or simply annoying him.

He is highly skilled in long combat battle and fights with his Demon Gun "Byakkomaru," which can spot his enemy perfectly and shoot when Shinya says "Bang". Byakkomaru's bullet holds the image of a "White Tiger." He has high capacity of spellcraft from since childhood, Shinya is not comfortable about being with the Hīragi's.