Nepheli Loux Questline

Quest Step	Location (Click for Map Link)
Nepheli is first found in Stormveil, from the Secluded Cell grace head out past the giant and down to the Erdtree Sapling, just past here to the left is a small room where you can find Nepheli, exhaust her dialogue here
After defeating Godrick exhaust Gostoc’s dialogue
Head to Roundtable Hold and speak with Nepheli near the Twin Maidens Husk, exhaust her dialogue here
Nepheli can next be found at the entrance to the Village of the Albinaurics, speak to her and then defeat the Omen Killer
Go back to Roundtable Hold and she will be downstairs past Hewg, speak to her and then go and speak to Gideon about her If you have Seluvis’s Potion do not give it to Nepheli, either give it to the Dung Eater or Gideon
Now you need to go back to the Chapel of Anticipation, you can get back here from the Four Belfries (Easternmost Waygate), Defeat the boss and head up to the chapel where you started your journey, a side door is now open and you can get the Stormhawk King and Stormhawk Deenh ashes
Return to Nepheli and give her the Stormhawk King ashes, exhaust her dialogue after giving her the item
To continue Nepheli’s Quest you need to defeat Morgott in Leyndell and complete Kenneth Haight’s Quest
Go to the Godrick site of grace and reload the area, head into the Throne room and you will find Nepheli, Kenneth, and Gostoc.