Diluc

Diluc is a tall, athletically built, attractive young man with fair skin, long red hair tied in a ponytail, and crimson eyes. He wears black pants and a shirt, a white vest, and a black tailcoat decorated with gold embroidery and a lace capelet on the shoulders. He is also dressed in tall black boots. His outfit is complemented by a black neckerchief fastened with a pin featuring a red gem, a belt and sash with a gold buckle to which his Vision (Eye of God) is attached, and black gloves.

Kaeya refers to himself and Diluc as "antiheroes with a complicated relationship." Once, Diluc was a passionate and confident young man sincerely devoted to his work with the Knights of the Favonius. However, after the sudden death of his father, he became withdrawn, distant, and filled with bitterness. He dislikes wasting time on small talk and quickly loses patience.