Where is Lania in Elden Ring

To find Lania, you need to go up to the area north of Thunder Veil Castle. In Lake Liurnia, go to the indicated point:

You will find a man who found the corpse of the maid Lania, whom he spoke about in the Fortress of the Round Table. Someone killed her, and he wants revenge. You can help him by finding the people who did it. Diallos will return to the fortress of the Round Table (after a while) and will tell that he has attacked the trail of the rebels who killed Lania.

They invited him to Vulkan's estate. Go to the living room of the manor. Accept Tanith's offer to become the new hero of the estate. Talk to Diallos. Tanit persuaded him and he refused revenge. He joined the rebels. Follow the orders of the estate and Diallos will realize that he did the wrong thing. He will leave the fortress.

In Kuvsingrad of Lake Liurnia, you need to communicate with the Child of the Jug. Repeatedly. Diallos will appear shortly. The Child of the Jug will tell you that the Great Potter has appeared in the city. This is Diallos. Complete a contract to kill Juno, brother of Diallos. Diallos will protect Kuvshingrad, but will die. Return again and take the loot from the corpse. Including new weapons.