To unlock the “Mirror, Mirror” trophy in Wuthering Waves, you must complete Buling’s Serendipity side quest, located in the Septimont region. This quest becomes available after finishing the Chapter 2, Act 6 main story quest, “Flames of Heart.” This guide will help you unlock the “Mirror, Mirror” trophy in Wuthering Waves. Let’s get started.
First, finish Lupa and Cartethyia’s side stories.
After you finish Flames of Heart, two new side stories will show up.
- Companionship: (involving Lupa)
- Three Wishes (involving Cartethyia)
You need to finish both of these side stories. If you skip them, you will not see the next step for the trophy.
After completing the above quests, advance the in-game time by a few days. This can be done by waiting or using the in-game time skip feature if available. After a few days pass, head to the cable car station in Septimont.

You need to go to the spot marked with the red square in the image above. Walk around the area, and the Serendipity after-story side quest will automatically appear in your quest list.
Start and Complete the “Serendipity” side quest to get MIRROR, MIRROR trophy.

Follow the quest navigator to find BuLing at another cable car station nearby in the same area. Talk with her and watch the dialogue and cutscenes, where she shares thoughts about her vacation ending and some personal reflections.
After the first cutscene, go to the next marked spot to meet Buling again at a different cable car station. Speak with her one last time at this location to complete the quest and earn the Mirror, Mirror trophy.

Note: You can only get the quest and trophy after meeting all the steps listed in this guide. If Serendipity does not show up, check that you have finished both after-story side stories, then try skipping more in-game days.