Asuna Yuuki and Kazuto Kirigaya from Sword art Online anime whom Keiko Ayano from the game Sword Art Online admires the both of them. during 1 the night of Asuna Yuuki's delivery, Keiko Ayano is caught in a accident and died. But Keiko Ayano is reincarnated as Silica, Asuna Yuuki and Kazuto Kirigaya's daughter they named her Silica in memory of their friend who was killed. Silica has a twin sister named yuuki whom is another reincarnate of Yuuki Konno whom she became close to 2 years prior.