Meeting Fia for the first time
The first encounter you will have with Fia will be at the roundtable as seen on the map above. Get out of the table area and enter the room to your right. You will find Fia sitting on the bed. Talk to Fia and allow her to hold you. You will receive the Baldachin’s Blessing. Now you need to get both halves of the Dectus medallion before you can continue her questline.
How to get both Dectus Medallion
The Dectus Medallion is a key item you will need if you want to unlock the Grand Lift of Dectus. The first half of the medallion will be at Fort Haight West. Head east until you reach the fortress which is Fort Haight. Climb up the stairs on your right and when you reach the top, head into the tower instead of going down to the next set of stairs. Climb up the ladder inside the tower and you will find the chest containing the left side of the medallion on top of the tower. The next part of the Dectus Medallion will be in Fort Faroth. Use the Fort Faroth grace site and climb up the stairs into Fort Faroth. Once you are inside, head north until you see an entrance with a ladder. Climb the ladder and you will find a chest at the very top containing the next side of the Dectus Medallion. Once you have both medallions, go to the grand lift of Dectus and activate it. Now you need to go to the Atlus Plateau site of grace and rest there. Once you are done resting at the Atlus Plateau site of grace, you can go to the next part of the quest.
Meet D
Go back to Fia and when she holds you, there will be an option for you to talk in secret. Choose to talk in secret and she will ask you for a favor and give you the Weathered Dagger. Simply go back out to the Roundtable hold and talk to D. Give him the weathered Dagger. After giving him the dagger, reset somewhere else and visit the Roundtable Hold again. Instead of going to Fia’s room, head northeast instead to the next room and you will find D on the floor and Fia next to him. You can loot D to get D’s Bell earring and Twinned armor set. Talk to her and you can move to the next step.
Get the Carian Inverted Statue
Before you can continue with Fia’s questline, you need to start Ranni’s questline first. You can check out our full guide for Ranni’s quest here. Talk to Ranni in Ranni’s rise and she will ask you to collect the Fingerslayer Blade in Nokron City. At this point of the quest, you also need to defeat Radahn to continue. Once you get the Fingerslayer Blade in the Nokron City and return it to Ranni, you will get the Carian Inverted Statue as a reward.
Go to the Study Hall
The next thing you want to do is to go to the Study Hall and examine the Pedestal in the middle of the hall. Place the inverted statue in the middle of the hall and wait for the cutscene to end. Go to your left and jump across the gap to get to the open area. Turn left and follow this path until you can jump down on the chandeliers underneath you. Use the wooden planks to go down and reach the wooden lift on your right. Use the lift and head east until you reach a door. Open the door and head east to the Divine Tower of Liurnia. Go inside and use the lift to get to the top. Unlock the site of grace here and climb the stairs to your right. When you reach the end of the path, you should see a circular platform to your left. There is a corpse here so go ahead and loot the corpse to get the Cursemark of Death and Stargazer Heirloom. Once you have the Cursemark of Death you can go to the next step.
Head for the Deeproot Ruins
To get to the Deeproot Ruins, you need to start at the Ancestral Woods grace site first. If you already did the first part of Ranni’s quest, you should have encountered this grace site on your way to the Fingerslayer Blade. From here, head east until you reach the main road. Once you are back on the road, head north until you see some jellyfish. Head northeast until you reach the end of the cliff. You will see a corpse to your left. From here, jump down the cliff and follow this path to get to the Aqueduct-Facing Cliffs site of grace. Head east and jump down, using the bridge to cross to the other side. Jump down again and you will reach the Siofras Aqueduct. From here, head northeast until you see some stairs leading to an entrance.
Defeat the Valiant Gargoyle
Go inside and turn right to get into a room with a long hallway. Head north until you reach a waterfall. Go to your right and head northwest this time, climbing the stairs that leads to the Valiant Gargoyle boss fight area. Defeat the boss and you will get the Gargoyle’s Greatsword and Gargoyle’s Twinblade as a reward. Head southwest and you will reach a site of grace. Rest if you need to but head northwest towards the waterfall and you should see a coffin. Rest in the coffin and you will be transported to the Deeproot Depths.
Find Fia
Once you have reached the Deeproot Depths, you need to find Fia. Head south and you will find a site of grace. Activate the grace then head southwest. When you reach the cliff, jump on the giant roots on your right and keep heading west until you get to the other side of the mountain. From here, head west until you find another site of grace, which is the Deeproot Depths site of grace. Head north this time, weaving underneath the tree roots until you see a small temple. You will see a corpse on this small temple so go ahead and pillage it. You will get the map of the Deeproot Depths here. After getting the map, head west and you will pass through another site of grace, which is the Nameless Eternal City. From the site of grace, go through the arch then head east. You will see a huge branch here so go ahead and use that as a path, heading north. When you reach the fork, head east until you see a broken-off branch to your left. Jump on this branch and follow this path until you reach the end. Jump down on the cliff to another site of grace. From the site of grace, head north and you will enter a large area. Defeat the enemies that will spawn to get Fia’s mist.
Talk to Fia
After defeating the enemies, Fia will be sitting on a branch. Talk to her and tell her that you want to be held. Talk in secret until you get the option to give her the Cursemark of Death. You will get the Radiant Baldachin’s Blessing. Exhaust her dialogue and she should fall asleep. If not, talk to her then reset in the nearby site of grace. Touch her while she is sleeping and enter the Deathbed Dream.
Unlock Age of Duskborn Ending
Be prepared to fight the Lichdragon boss after entering the Deathbed Dream. Once you defeat Lichdragon Fortissax, you will get the Remembrance of the Lichdragon. Go back to Fia and get the Mending-rune of the Death-Prince. At the end of the game, use the Mending Rune of the Death-prince to get the Age of Duskborn Ending.
D’s Revenge
After getting the Mending Rune of the Death-prince, you can complete the quest. However, there is a small after-story that you can do as well. You can go to the Great Waterfall Basin and head southeast. Talk to the NPC here and you can give the Twinned Set to him. When you go back to Fia, she will be slain by D’s brother and you will get both Fia’s armor and Twinned Armor. You will also get the Inseparable Sword. If you want to prevent this scene, you can immediately kill D in the Roundtable hold before giving the dagger to him. Give the Twinned set to his brother early in the questline and D’s brother will fight you instead.
Summary
Fia is the companion of Godwyn, Prince of Death and her goal is to be the mother of those who ‘Live in Death’. Help her achieve her plans and get the Cursemark of Death to complete her questline. Completing her questline will also give you the alternate ending called Age of Duskborn. You can only get this ending if you have the Mending Rune of Death-Prince.