Despite coming off as bitter and grumpy through his speech, he has a gentle, tender, and modest nature. Despite being the owner of Mondstadt's largest wine industry, Dawn Winery, Diluc is not fond of alcohol, as he does not like its taste and that it clouds his mind when he tries to work. Diluc is a former Knight of Favonius. He left shortly after his father’s death. Diluc is the mysterious vigilante known as the "Darknight Hero". As a Vision-holder, Diluc possess fire-based elemental abilities.