Mii是任天堂游戏机Wii、Wii U和任天堂3DS中，可自由定制的数字化身。Mii可让用户制作自己、他人或所创角色的肖像。在通过Wii的Mii频道或任天堂3DS和Wii U的Mii制作应用创造Mii后，它就可以当作这些游戏机上的许多游戏的玩家角色。Mii通常被认为是“Wii”和“me”（我）的混成词。 在2003年的美国e3展上，任天堂曾经公布了一款名为《Stage Debut》的ngc软件。不过该软件最后无疾而终'如今，Wii上面的“Mii”基本就是相同的理念，不过把“摄像头拍摄人脸”的想法变成了用户可以自己编辑自己的Mii形象，这个虚拟化身同样可以在《Wii Sports》等Wii软件里面登场. 相关服务：Mii世界、Mii广场、Mii工作室

A Mii is a free-form digital avatar used in Nintendo's Wii, Wii U, Nintendo 3DS and Nintendo DSi gaming consoles. The Mii concept allows users to develop a likeness (or a caricature) of themselves, other people, or invented characters. After creating a Mii using the Mii Channel on a Wii or the Mii Maker application on a Nintendo 3DS or Wii U, Miis can be used as playable characters in various titles for each of the named consoles. The word "Mii" is often thought to be a portmanteau of "Wii" and "me". In an investor's meeting in October 2015, Nintendo revealed their first mobile app (from their partnership with DeNA) Miitomo, which will dominantly feature official Mii characters appearing on a non-Nintendo device for the first time.