Kazuya

Kazuya is the Demon Chieftain of the Six Districts of Mutsu and a member of the Ten-Demon Alliance.

He is the calmest out of all of the characters. While his aloofness makes others keep their distance, he is trusted by other chieftains and demon villagers. He rarely expresses his feelings and will give you the cold shoulder at first, but that makes his smiles much more worthwhile.

He has short black hair, amethyst-colored eyes, and pale skin.

Taken from Demon's bond wiki.