In Honkai: Star Rail, the “We act in the darkness to serve the light” achievement is part of a secret quest on Lofu Xianzhou. As part of its completion, you will have to help a restless robobird catch a suspicious person who has infiltrated the “Sky Cleaver”. In this guide, we will tell you how to detect a potential attacker and get a reward for it.
Achievement “We act in darkness to serve the light”
How to start the quest
Travel to the Lower Floor of the Skybreaker Arena. You can gain full access to the ship after completing the story mission “Duel Under the Azure Sky II”. When you find yourself in the right room, run to its eastern wall. There, almost opposite the teleport, a worried robo-bird flutters. Start a conversation with her to start the quest.
How to find the suspect
Listen to the concerns of the robobird. To help her, you will need to possess another deliveryman. His nest is located near the same wall and slightly south of the place where you just had a dialogue.
Once you start the mechanism, fly to the side above the gate on the western wall of the arena. Depending on your graphics settings, a whitish cloud will begin to appear above the teleporter as you approach the point. Head straight to it to report that the hider has been discovered.
How to get the reward
Return to the character and go to the responsible roboptaha, waiting for you in the same place. Let her know about your search results.
After finishing the dialogue, the achievement “We act in darkness to serve the light”, some credits and materials for upgrading weapons will be yours.