Sayu Yagami

Species Human Blood type O Date of birth June 18, 1989 (1992 in anime) Age 21 Weight 45kg Family Soichiro Yagami † (father) Sachiko Yagami (mother) Light Yagami † (older brother) Hikari Yagami † (nephew; 2016 live action film only) Occupation Student Knowledge 3/10 Creativity 4/10 Initiative 3/10 Emotional Strength 4/10 Social Skills 8/10 Involvement 8/10 Appearance: Sayu has upper-back length chocolate-brown hair and brown eyes. As a child in the first part of the story, her hair is pulled back in a ponytail with bangs hanging on the the right and strands of hair that frame the sides of her face. As an adult during the second part of the story, she wears her hair down and her bangs remain swept to the right side. Character: In line with Sayu's age and grade in school she demonstrates age-appropriate behavior, such as watching shows starring Hideki Ryuga and asking Light for help with math homework. She seems to look up to Light, as she recognizes his intelligence and believes that he will become a quality detective. Though they are fairly close at the start of the series, their relationship is somewhat distanced as Light becomes more absorbed into his role as Kira. In her university years, Sayu's attitude grows more mature, and she studies on her own without Light's help. Sayu is left deeply traumatized after her kidnapping by Mello and his men, becoming mute and withdrawn following the incident. According to Death Note 13: How to Read, Sayu likes shoes and dislikes alcohol. Plot: Sayu is a 14-year old third-year student (9th grade) at Eishu Junior High School (英集中学校, Eishū Chūgakkō) at the beginning of the story. Her role at this point is rather minor, though she ends up playing an unintentionally important part in Light's plans when he offers to bring Soichiro an extra change of clothes in Sayu's stead; he ends up meeting Naomi Misora while running this errand and kills Naomi after he finds out she is the fiancé of deceased FBI agent Raye Penber.

In the second part of the series, Sayu is attending college. She is kidnapped by the Mafia and taken to the United States, where she is held captive in order for the Mafia to gain the Death Note in the possession of the Japanese Task Force. Soichiro trades the Death Note in exchange for his daughter's life. Sayu is taken back home to Japan, where she falls into a state of shock and is wheelchair-ridden for some time.