Born into the affluent Ragnvindr Clan, Diluc is the current owner of the Dawn Winery and a nobleman of high esteem in Mondstadt. While a past incident caused him to split ways with the Knights of Favonius, he continues to protect Mondstadt in his own way.

As the richest man in Mondstadt, Diluc always shows his most exquisite side. However, his true nature is that of a warrior with great determination. He protects Mondstadt with all his might at all times.