A robot launched into mass production after the death of her creator, Professor Sawai. She works as a maid, doing various household chores and other tasks. Available for purchase to anyone who has enough money. In Japanese "mi+fuyu" means "beautiful winter." This line of robots was originally endowed with sexual function and a full set of emotions. However, this led to a major scandal. Community has accused Professor Sawai in an attempt to recreate a human. As a compromise, the manufacturer installed the emotional circuit limiter on Mu. So, unlike such models like Miharu, Minatsu and Miaki, Mu doesn't express any emotions.