Isabella is a Mii from the Wii.
Isabella originally appeared as one of the 10 default Miis in the WiiWare title Bejeweled 2. She hasn't appeared in any game since. Her Mii data file filename is sample10.rsd.
She does not have a creator name or birthday, and has Mingling turned off. Her Mii name in her Mii data file is Isabella.
Her Mii data file contains unused data. Specifically, her facial hair color is set to blonde (second row fourth column) and her mouth color is different (second option), despite her mouth not showing colors.
Isabella is one of the few Miis to appear in her game. Bejeweled 2 (WiiWare) uses these 10 Miis as default player save icons.
Isabella unfortunately does not appear in any promo art. This is because her game, Bejeweled 2, does not have any promo art.