Let's discuss everything Nioh 2 modding (SFW) related here
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Nioh 2 Mod Enabler 1.1 (Update!)
Installation:
Extract the contents of 7z folder into the game directory (where nioh2.exe is located)
Keys:
F1: Show help
F2: Toggle mods off and on
Shift+F2: Cycle mod shadow modes (on/off/original)
So I was messing around with Okuni's attire and I found this:
She seems to have a chest mesh or whatever, rather than an abyss where the chest should be, like it is with the wrappings. I personally can't do much with this but I assume this information might be useful for you more experienced modders.