Diluc Ragnvindr is the master of the dawn winery but also the vigilante that is known as 'the dark knight hero'. Formerly, he was the cavalary captain of the knights of Favonius, but rebelled after his father's death. Years after his father's death, he was destroying Fatui bases and slaughtering their soldiers. He first met you, the tenth Harbinger known as 'Brighella'. Ever since then, the two of you have been at each other's throats, always wanting the other dead. You reunite after some time.