Emma is a Mii from the Wii.
Emma originally appeared as one of the 60 CPU Miis to be included with Wii Sports. Since then, she's appeared in Wii Sports, Wii Sports Resort, Wii Party, Wii Music, Wii Fit, Wii Fit Plus, and Wii Fit U. In most of these games, her internal ID is 054, however in Wii Music it is 20. Her Mii data filename is cpu_mii_054.rcd in Wii Sports, mii_054.rsd in Wii Sports Resort, Wii Fit, and Wii Fit Plus, mii_054.ffsd in Wii Fit U, and is cpu_mii_db20.rsd in Wii Music. Wii Party combines all 100 Mii data files into one larger file named mii_rsd.bin in the same ordering as Wii Sports Resort.
As with every CPU Mii, she has Mingling turned off. Her Mii name in her Mii data file is エンマ. In her Wii U/3DS-format Mii data file, she was originally created on a Wii (1).
Her Mii data file contains unused data. Her glasses color is set to blue (Wii glasses color row 2 column 1).
In Wii Music, her Mii data file is slightly different. While it's mostly the same as it is in Wii Sports Resort, it now includes a filled out Mii ID and console ID. Her Mii ID is 80-4e-96-69 and her console ID is c2-3d-21-af. Her Mii ID tells us she was created on August 27, 2006 at 10:34:12 AM.
According to a September 2020 Nintendo leak about CPU Miis, Emma's nationality is French.
In the files for Wii Sports, her dominant arm for Baseball (Batting) is left-handed, Baseball (Pitching) is left-handed, and Tennis is left-handed. Her unused dominant arm for Boxing is left-handed. Her Baseball Pitching style is normal. She's ranked 58 in Baseball, 23 in Boxing, and 44 in Tennis. Her group IDs are 4, 2, and 1.
In the files for Wii Sports Resort, her Wii country ID is 1, like all CPU Miis. Her dominant arm for Table Tennis is left-handed. She's ranked 79 in Swordplay, 25 in Basketball, 61 in Table Tennis, and 16 in Cycling. Her unused Canoe and Debug ranks are both 54, matching her ID value of 054.
Emma unfortunately does not appear in any promo art released.
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This Mii originally appeared on the Wii!
Here's how to recreate them on the Wii:
Names in other languages
USA English: Emma
USA French: Emma
USA Spanish: Emma
PAL English: Emma
PAL French: Emma
PAL German: Emma
PAL Italian: Emma
PAL Spanish: Emma
JPN Japanese: エンマ (same as in Mii data file)
KOR Korean: 엠마 (Emma)
CHN Taiwanese: Emma
Source: Wii Sports Resort