Maybe I missed this somewhere, but are there not NPC costumes coming to Lost Ark? Some of them, such as the Mercenary Females or Mages and Knights look really great.
Some named NPCs who have same outfits as their generic counterparts that I think would look amazing on PCs.
Mercenary Zeira
Avele
Cals
I’ve seen various videos for the KR/RU version with lots of great looking costumes, but the videos don’t seem to include any NPC outfits.