A Mii ( MEE) is a customizable avatar used on several Nintendo video game consoles and mobile apps. The name Mii is a portmanteau of "Wii" and "me", referring to them typically being avatars of the players. Miis were first introduced on the Wii console in 2006 and later appeared on the DS, 3DS, the Wii U, the Switch, and various apps for smart devices such as Miitomo. https://en.wikipedia.org/wiki/Mii