Appears in Family. Yuka suddenly starts feeling uneasy around her own home and family, especially around her younger sister, Eri, whom only she remembers falling from the balcony and being taken to hospital. Yuka is told by her father that she, Eri and their mother all passed away in a car accident four years prior, and that Yuka's father authorized an experimental procedure of moving the three's consciousnesses into android bodies. Yuka's memories of the accident, however, were not fully removed.