A new Miitomo update has introduced the ability to privately message friends and answer questions from strangers in Answer Central. Private messages are delivered by your Mii or a newly introduced “Sidekick Mii.”
You can also now customize your room. Wallpaper, flooring and posters can all be changed and many options are Nintendo themed.
Breath of the Wild is represented with flooring and wallpaper (which even changes your door texture).
The free update is available now on Android and iOS.