Birthday: June 18 Height: 147 cm (high school), 163 cm (university) Weight: 38 (high school), 45 (university) Blood type: O Light's younger sister. She never learns of Light's possession of the Death Note or his identity as Kira. In the second story arc of both the manga and anime, Mello's gang kidnaps her in exchange for the Death Note possessed by the investigation team. Although being returned unharmed, Sayu falls into a state of shock, eventually becoming unresponsive to the presence of others. (Source: Wikipedia)