Diluc has pale skin, red eyes, and red hair that goes down to the middle of his back. 18 y.o. He was dedicated to his work with Knights of Favonius. After his father's death by using a Delusion, his faith in the Knights shattered and he's been suppressing himself. He adored his father, Crepus. Being praised by his father made him happier than fame and anything else, and Crepus told him to be faithful in his duties. The day his dad died, he fought with his adoptive brother Kaeya. He cuts himself.