Here are the 3 Miis that My mom can play with on Mii Fashion Plaza. The reason why the wheel only has 3 Miis is because there is a Princess Peach dress in the game and My other 3 Princess Miis: Daisy, Rosalina, and Zelda might confuse the Peach Mii. So, as a result, I removed My other 3 Princess Miis from the wheel.