Sirris of the Sunless Realms may seem to randomly appear around Firelink Shrine in Dark Souls 3, but there’s a pattern to these appearances as the NPC actually requires your assistance. You can obtain quite a bit of armor and a few other items from completing this NPC quest if you have the time to venture around the various areas of Dark Souls 3.
The NPC will first appear in Firelink Shrine after you reach the Farron Keep area. Speak with her at Firelink, then once you find the Deacmchaser’s Ashes in Farron Keep, give them to the Shrine Handmaid at Firelink. Leave and return to find Sirris in Firelink again. When you speak with her this time she gives you the Darkmoon Loyalty gesture. Once you have the gesture you can summon Sirris to help you during boss battles in the Farron Keep and Cathedral of the Deep areas.
When you reach the Irithyll of the Boreal Valley area you must defeat Sulyvahn’s Beast on the bridge leading to town. Leave and return to the area to find a white summon point for Sirris on the ground near the entrance to the bridge. Journey into her world and help her defeat Creighton the Wanderer. Head back to Firelink to find Sirris waiting for you. Speak with her to obtain the Blessed Mail Breaker sword and Silvercat Ring.
At this point, Creighton the Wanderer will invade as you venture through Irithyll of the Boreal Valley. Kill him to obtain the Dragonslayer’s Axe. Leave the area and return to the bridge where you helped Sirris to find an item corpse that holds Creighton’s Steel Mask, Mirrah Chain Mail, Mirrah Chain Gloves and Mirrah Chain Leggings.
You can head into Anor Londo from the Irithyll of the Boreal Valley area. Once there, defeat Aldrich the main boss, then head back to the Undead Settlement and head over to the room where you fought the Curse-rotted Greatwood. This room is now one large hole, but in front of this area is another white summoning sign for Sirris.
Help Sirris one more time to obtain the Sunset armor set. You can also find the Sunset Shield by the grave of her grandfather beyond the doors from Iudex Gundyr’s room. Head back to Firelink Shrine and speak with Sirris one more time. Accept her vow and you can summon her for the Dragonslayer Armor (Lothric Castle), and Lorian and Lothric (Grand Archives) boss battles. Complete these battles and you’ll find the Sunless Talisman and Sirris’ corpse by her grandfather’s grave.
For more NPC tips be sure to check out our Dark Souls 3 walkthrough and guide!