柊 暮人

Kureto is the Lieutenant General of the Japanese Imperial Demon Army and is expected to become the next leader of the Hiiragi Family as well as the Japanese Imperial Demon Army. His ambition is to exterminate vampires from Japan, and have the world under the control of the Japanese Imperial Demon Army. 

Proud and powerful, Kureto doesn't tolerate any disrespect from lower-rank families. He is manipulative, ruthless and treacherous, and will not hesitate to abandon his comrades if he no longer finds them useful. In fact, he finds that being able to abandon your own friends as a 'strength'. He expects everyone to submit to him with absolute loyalty, and as such, is very confident with himself, his plans and his actions.

Kureto has an ambition of wiping out every vampire on the planet and intends to rule the world, stating that he will turn it into a "vampire-free paradise." He plans to gather every surviving country and unite them as one, making Japan the center of all nations (i.e. world domination).

Despite his harsh personality, he possesses a sense of self-righteousness and sees anyone who is willing to sacrifice others for pure greed and with no goal as evil. 

Owari no Seraph Wiki