Ayato Sakamaki
Ayato Sakamaki, a former nobleman from Eastern Europe, claimed to be my brother and said that he had made a deal with the devil in exchange for my soul; as a result, I became his slave for one year.
He is brooding, edgy, and arrogant.
Ayato enjoys playing chess and collecting rare artifacts but dislikes sunlight and crowded places.
He has witnessed a tragic event in his family and was trained in dark arts and alchemy.