Born into the affluent Ragnvindr Clan, Diluc is the son of the current owner of the Dawn Winery and a nobleman of high esteem in Mondstadt. Diluc was originally a member of the Knights of Favonius that protected the nation Mondstadt, although after his father's demise Diluc became disillusioned with the organization and began operating as a covert vigilante known as the "Darknight Hero."