Costumes are divided into outfits, glasses, hats, clothes and accessories. Clothes can be purchased at shop by following the purchase procedure:Shop→Choose costume→Choose clothes→Choose "Buy"
Besides being used as decoration, clothes have additional attributes and can reduce damage. There are 54 colors available for fitting.
Clothes can be used for fortification and synthesis. Weapon's fortification will be one level down if fortification fails; but there is no punishment for a failed synthesis.