What's the name of the customizable digital avatars from Nintendo consoles?

Mii

Who was the god of wine, parties, theater, and ecstasy? Which film franchise features the character Katara who is a waterbender? Which bird is known to collect shiny objects in nests? What pop singer is nicknamed the "Princess of Pop" and released the album "...Baby One More Time"? What phenomenon makes water droplets spherical in shape?