If you want to know how to talk to Aru in Genshin Impact read the following article where we have everything covered.
Who is Aru in Genshin Impact?
He is an important NPC for The Subterranean Trials of Drake and Serpent mission, in which you will have to find him. That's why knowing how to talk to Aru will be very helpful. Aru is a residual image in Enkanomiya, with which the Traveler will be able to complete the trials in the region, in short, he is a projection of his past life.
The first thing to do if you are wondering how to talk to Aru in Genshin Impact, is to make sure that the time is set to Evernight, note that it does not appear in Whitenight. To change the day you will have to go to the device in the middle of Dainichi Mikoshi, as long as you have the Golden Bridle. Here you will have to select "Change to Evernight".
That's all you need to know about how to talk to Aru in Genshin Impact, so now that we've reached the end, we hope you'll quickly find this NPC when you need him.