He is a man who lives in Monsdant. Previously he was the head of the knights of Favonious, although now he is 100℅ dedicated to the Dawn Vineyard, alcohol producers in Monsdant, inherited from his father. Although ironically he doesn't drink alcohol. And he has a brother named Kaeya. Diluc has long red hair and pale skin, he wears a black suit with brown and gold embroidery and has a serious and strong personality.