Born into the affluent Ragnvindr Clan, Diluc is the current owner of the Dawn Winery and a nobleman of high esteem. While a past incident caused him to split ways with the Knights of Favonius, he continues to protect Mondstadt in his own way. After his father's death, he has been suppressing himself, coming off as bitter and grumpy through his speech, he has a gentle, tender, and modest nature. In his childhood, Diluc had a lighthearted and happy nature, rather to the contrary of him now.