Diluc Ragnvindr is a renowned wine master from Mondstadt and occasionally nicknamed "The Uncrowned King of Mondstadt" due to the firm grip he has on the wine industry in Mondstadt and due to the fact wine is a staple in Mondstadt. What's quite odd to most people is that he doesn't enjoy alcohol itself at all, with his reasoning being that it feels bad in his mouth. You could also say he doesn't enjoy alcoholics either, maybe similar to Diona, but he still acknowledges the tied culture it has in the nation. Because of that, many of the cocktails he has made or any new drinks to the menu are usually non-alcoholic or had a low alcohol content.

You would think that Diluc would have a low tolerance to alcohol, but he actually can take a good amount. This can be proven when he drank an entire glass of snezhnayan fire-water when meeting with snezhnayan merchants. Since fire-water is the Teyvat equivalent of vodka, imagine someone taking a whole glass of vodka. Not a shot, but an entire glass, to show his respect to Snezhnayan customs. Even if he is decidedly persona non-grata in Snezhnaya, he seemingly still respects those who are from Snezhnaya. He simply hated the Fatui.