Citra Mii Maker Portable _top_
is not an official software suite but rather a workflow. It involves acquiring a decrypted, portable dump of the Mii Maker.cia (CTR-M-MAPP) application and installing it onto your Citra emulator (or using a standalone version of the Mii Editor). The term "Portable" signifies that you can run this setup from a USB stick, cloud folder, or external hard drive without installing dependencies on the host computer.
It wasn't supposed to exist. Citra was an emulator for a bygone era of dual-screen gaming, and the Mii Maker was a simple utility—a digital toy for crafting avatars. But Elias had found this specific "Portable" build on an obscure archive site, buried under layers of broken links and "File Not Found" errors.
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