This guide shows the complete walkthrough of Diallos’s Questline in Elden Ring
Talk to Diallos in the Roundtable Hold
You will find Diallos in the Roundtable Hold. Talk to him and he will tell you that he has lost his servant, Lanya. He will request you to find Lanya and inform him about her location.
Where to find Lanya
You will find Lanya on the north side of Academy Gate Town in Liurnia at the location shown in the pictures below.
Unfortunately, Lanya will be dead. Diallos would have already found out her location and you will find him crying near her corpse. He will say that he will take revenge. If you choose to kill Diallos, you will get Diallos’s Mask and Hoslow’s Petal Whip.
Meet Diallos in Volcano Manor
Volcano Manor is in Altus Plateau at the location marked in the picture below. The easiest way to reach there is by following Rya’s questline.
Once you are in the Manor, talk to Tanith to get Drawing Room Key. Go to the hallway on the left side of the queen and open the door on the left side to enter the drawing-room. You can talk to Diallos here again for some extra dialogues. He will be a changed man now and he would say that Revenge is not the answer.
Defeat Juno Hoslow
Now proceed in the Volcano Manor questline. For this questline, you will have to complete three requests. For the third request, you will have to kill Juno Hoslow, who is Diallos’s brother. The third request location is northeast of the Ancient Snow Valler Ruins Site of Rest in the Mountaintop of the Giants as shown below. Interact with the red symbol in the area to invade the target’s world. Defeat the target, Juno Hoslow, to get Hoslow’s Armor set and Hoslow’s Petal Whip. Now go and talk to Diallos in the Volcano Manor. He will say that he is a fool and he has sullied the name of his house.
Complete the Volcano Manor questline
After you complete the Volcano Manor questline, Diallos will leave the Volcano Manor and move somewhere else.
Meet Diallos in Jarburg
Now, Diallos’s questline will intersect with Jar Bairn’s questline. Proceed in Jar Bairn’s questline, and after some time Diallos will move to Jarburg. He would have become a Potentate (Someone who protects the Jar people).
Go to the open house on the northern portion of Jarburg. You will find Diallos here, taking care of a jar. Talk to Diallos and he will tell you that he might be a fool but even he can take care of some simple jars.
End of Diallos’s questline
Come back later to the village and you won’t find Jar Bairn at his spot. Go to the village and you will find him near the house where you talked to Diallos. He will tell you that the village was attacked by a poacher and Diallos fought them.
Nearby, you will find an injured Diallos. He will ask you whether he was able to successfully defend the jars or not. You will get two dialogue options here. Your choice does not have any impact on the questline. Diallos will die after the conversation is over.
Reload the area and come back. You will find Jar Bairn standing next to Diallos’s body. He will tell you that he wants to be a warrior like Diallos, who protects everybody.
Reload the area and go to the location where Diallos died. You will find Diallos’s Mask, Hoslow’s Petal Whip, and Numen’s Rune as the location. This completes Diallos’s questline.