Diallos is one of the many NPCs you'll encounter that has a side quest to complete in Elden Ring. For this part of our Elden Ring Wiki guide, you'll find details of where to find him, how to begin his questline, and the outcomes of your choices along the way.

Diallos at the Roundtable Hold

You'll encounter Diallos when you go to the Roundtable Hold for the first time. Speak with him and he'll tell you about Lanya, his companion, who is missing. He will ask you to keep an eye out for her on your travels.

Diallos at Liurnia of the Lakes

As you move towards the Academy of Raya Lucaria in Liurnia of the Lakes, you'll see Diallos again near Academy Gate Town. From the Site of Grace, head north to find Diallos standing over the body of Lanya, mourning her. Speak to him, then travel to the Roundtable Hold where he will be again. Exhaust his dialogue here again to have him move to Volcano Manor.

Diallos At Volcano Manor

At Volcano Manor, you can find him in the drawing room where you'll pick up the letters for the Tanith Questline assassinations. He will be to the right of Bernhal.

Speak to him each time you complete your first assassination and he will leave Volcano Manor, returning later on looking defeated. Once you've completed the Volcano Manor quests, Diallos will leave along with everyone else.

Diallos at Jarburg

The next place you'll see Diallos is Jarburg, south of the Carian Study Hall. You can find him in one of the little shacks, talking to a jar. He says that he's forging his own path now, after leaving Volcano Manor.

Leave the area and allow some time to pass (around 3-4 in-game days) to find that a poacher attacked Jarburg in the interim, slaughtering all the jar people. Diallos will be laying on the ground, mortally wounded after attempting to defend the jars. He will ask if he was successful in defending the town; whether or not you choose to be truthful here has no impact on his quest.

Upon reloading the area, Jar-Bairn will now be standing near Diallos, and will express their desire to become a great warrior like Diallos. Reloading the area one final time will allow you to retrieve Hoslow's Petal Whip, Diallos's Mask, and a Numen's Rune from Diallos' body.