We're really feeling these designs
Xenoblade Blade Chronicles 3 is getting its third wave of expansion pass content on February 15th, 2023, and included in that DLC drop is a new set of costumes.
First up is the Nostalgia set of costumes, which outfits your characters with apparel based on characters and costumes from Xenoblade Chronicles and Xenoblade Chronicles 2. You’ll see costumes inspired by Shulk, Reyn, Fiora, Melia, Nia, Brighid and Jin. You can unlock these costumes by participating in Archsage’s Gauntlet.
The other set of costumes is earned by bonding with Masha, which will let you swap class to Jewel Meister. Doing so will get you the costumes you see above.