Costume Enchants

Overall Process

The general process has 3 layers of RNG:

Get an enchantable costume.
Buy desired costume loot box (can use gacha), open it, and hope to get desired costume.
Exchange costume and hope to get desired enchant stone.
Use enchant stone and hope enchant succeeds.

Talk to Aver De Dosh (mal_in01 22/113) to enchant Headgear costume and Lace La Zard (mal_in01 20/107) for Garment costume.

You must have the costume equipped and the stone in the inventory to perform the enchantment.
To enchant a Headgear middle costume, take off the Headgear upper costume first.
To enchant a Headgear lower costume, take off the Headgear upper and middle costumes first.
Even without a stone, NPC will still tell you if equipped costume is enchantable or not.
A single costume headgear (upper, middle, or lower) can have both a stats effect enchant and a visual effect enchant simultaneously. Costume garments can have a Garment Stone and a Dual Stone simultaneously.
Stats effect enchantment has a 50% success chance, while visual effect enchantment has a 100% success chance.
Enchant on a costume can be changed by re-enchanting the costume with a new stone.
If enchant fails, then the stone selected for the attempt and any previous enchant in that slot will disappear. However, the costume and any enchants or effects in other slots are safe.
Dual stone go to costume garment's dual slot only.