Inside the nand folder, navigate to: 00000000000000000000000000000000/extdata/00048000/ Here, you need to place a specific Mii database file. If the folder doesn't exist, create it.
Setting up a version of Citra that includes the is a common hurdle for emulation enthusiasts. Because Citra (and its successors like citra mii maker portable
. This forces Citra to save all Mii data within that folder rather than your Windows Amiibo Support : Once your Mii is created, you can use Citra's Amiibo Emulation Inside the nand folder
For the app to work correctly without visual glitches (like "box faces"), you may need to dump system data from a physical 3DS or use a "fix" data pack found in community guides on 3. Alternative: Importing Miis Without the App citra mii maker portable