A persocom created by Kokubunji Minoru roughly two years before the start of the series. Yuzuki was created to resemble, physically and mentally, Minoru`s late sister, Kaede, who had died from an illness two years earlier. Yuzuki is programmed with all of the data that Minoru could remember about his sister; what she liked, what she disliked, as well as her habits and behaviours.