Fatui Mirror Maiden is new Fatui type enemy who uses Hydro Delusion to control Hydro Mirror in battle. For now, this enemy type only can be found in Inazuma.
Description by Adventurer Hanbook
A member of a special Fatui honor guard from Snezhnaya. Willing to do anything to achieve the grand goals of the Fatui, they are stark opposite of the dignity indicated by the title “Maiden”.
Fatui Mirror Maiden are highly sought because of these materials. This materials are used for some newly released weapon in Inazuma:
Fatui Mirror Maiden Farming Routes and Locations
With only 3 island in Inazuma, there’s only 12 reliable location to farm Fatui Mirror Maiden, not including defeat Mirror Maiden daily quest in Higi Village.
Hopefully we will get more locations in the future after upcoming Inazuma update considering there’s so few of them and we need a lot materials to upgrade the weapon.
Grand Narukami Island
In location number 1, Mirror Maiden will be accompanied by Fatui Pyro Agent. In next location, after done with number 2 you can just walk downstairs and you will find Mirror Maiden number 3.
Small island near Inazuma City
Tatarasuna and Nazuchi Beach
Take a note that Mirror Maiden in Tatarasuna area will always accompanied by other Fatui type enemies, whether it’s Cicin Mages or Skirmishers.
For first to second location, head to teleport waypoint then glide down to first location. Defeat them quickly and swim to second location.
As for third location, you will only find Cryo Cicin Mages at first. Mirror Maiden and the other Fatui will appear after you engage her.
Aside from these 3 locations, if you are lucky you will get “defeat Fatui Mirror Maiden” daily quest in Higi village.