Request: Please Devs, Add Sin-Eater Glam!

[Enkidoh]

There are already a lot of gear pieces with gold trim that you can dye white (or metallic gold) and "build your own" sin eater costume. You don't need a dedicated cosplay set just to replicate the general style of the designs.

^ This. OP, if you really want to cosplay/RP a sineater so badly, just get a Fantasia, change your skintone to as white as it will allow, give yourself white hair and red eyes, and then like Iscah said set white and gold trimed armour/gear (the Eden gear is particularly useful for this being already white and gold and 'angelic' looking by default, or use the AF1 set augmented for dyes and dye it white like the Cardinal Virtues. The gear that drops in Mount Gulg also works well). Instant sineater glam.