There are 4 types of crests : Green / Blue / Purple / Orange
One costume can contain 2x Green 2x Blue 1x Purple 1x Orange crests
Crests can be obtained from "Incarnation of Helion" npc in Ardeca or from D-shop.
To add crests to a costume, visit npc Pablos in Ardeca.
Choose "[Crest] Costume Reinforcement" then choose "Add a crest"
Select the costume and then select the crests you wish to add to that costume and click Apply.
Now, to take crests out of a costume, you choose "Extract a crest" tab, select the costume, select the crest and click Extract.
IMPORTANT : When extracting a crest from a costume, you will need to add a Plier, for 100 % success of crest removal. If you attempt to remove a crest from a costume without a plier, the crest can be destroyed.
A Plier will be added to remove 1 crest of your choice with 100 % success chance, or use a Hot Plier to remove all the crests from that costume, with 100 % success for all crests in that costume.
Plier and Hot Plier can be obtained from D-Shop.
Now, how to obtain a crest costume.
Open D-shop, purchase Mystic Fabric x 100, then visit npc Viola in Ardeca.
Choose [Costume Design] Change costume appearance.
Choose 2nd option, Transcendance Costume Sewing.
Select the costume you wish to craft, click on the + for how many costumes you wish to craft, then hit "Begin Sewing".
The costume will be crafted at 100 % success chance and it will appear in your inventory.
GG, now you have your very own Crest Costume.