The "Chill Musician" on Chest 3 is actually a local legend, you can get up to 3 achievements fighting her, just kill the animals around or atack her to start the fight.
I completed all the chest in the video that's because of your help I just want to say thank you so much for your efforts and time in making this video. it helped me so much. I'm saving up for Xilonen 💛 a new subscriber here btw!
The "chill musician" is one of the Local Legends. If you attack her, you'll be in for a tough fight, but there are three possible achievements you can get from her.
This just prove to me that exploration seems to not be related to the chests. I used to think that the more chest you open the more the exploration rose. But I have 100% of the map and missed a bunch of this😂