Official Miis of the JAE UTAU PROJECT characters have been created by Migi and are now added to the website! You can find the QR codes in the "Other Assets" sections of the character pages! These can be imported to the 3DS and WiiU systems, and you can use them for your own adventures!
You'll notice that many of the characters do not have the correct hair or eye colors. These were done on Mii Maker, which only have a small number of colors for hair, eyebrows, and eyes. However, some games allow players to customize colors. Migi has Tomodachi Life and Miitopia, two games for the 3DS. Tomodachi Life allows the player to change the haircolor and Miitopia has custom colors for hair, eyebrows, and eyes. QR codes for these games can be distributed if there is a demand for it.
On the note for the Nintendo Switch however, the characters would have to be made from scratch as there is currently no way to exchange Miis unless players are nearby each other or if a Mii was saved to an amiibo. If this changes in the future, these would certainly be added to the website!
For now, we hope you enjoy the Miis and bring them with you for delightful adventures!