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)
She is the daughter of Shuichi Aizawa and Eriko Aizawa. She first appeared at the end of episode eighteen when she asked her father if "off" means "vacation" and he starts to cry. After the time skip, she appears in episode 31 when Aizawa wonders if Light is Kira, saying that she was studying and tells him not to struggle so much.
After the founding of the SPK, Ratt walked outside their HQ and asked a citizen to borrow his phone so that he could inform Mello with information on the Death Note that he had found. Ratt was briefly seen being ordered by Steve Mason to get John McEnroe to pick up Soichiro Yagami and his daughter Sayu, who was kidnapped by Mello and the Mafia as a trade for the Death Note. After Mello obtained the notebook, he used it to kill Ratt, along with half of the other SPK members, by making him commit suicide by shooting himself in the head with a gun.
He is the Deputy Director of the National Police Agency and Soichiro Yagami's superior. He and his family, as well as Yagami's, were investigated by FBI agent Raye Penber over the leaking of information to Kira. Following Penber's death by Kira, L ordered similar investigations on both families: Kitamura's daughter was even approached by Mogi, posing as L, implying that she was under suspicion of being Kira — while L himself approached the actual suspect, Light Yagami. Kitamura confronted Soichiro Yagami over the issue of his daughter's treatment and was frustrated by Soichiro's insistence that secrecy prevented him from revealing details of the investigation, though Soichiro did admit that it was his own son who was the real suspect. Kitamura later helped Soichiro out of the Sakura TV studio after he had seized the Kira tapes which the station was broadcasting and which had led to several deaths by Kira. Kitamura sent a riot squad with police buses, shields and face-covering helmets in order to get Soichiro safely out of the building. However, he was later forced to call off the Kira investigation when politicians were threatened by Kira and bribed by the Yotsuba Group for whom Kira was then working for. He told Soichiro that he had tried to oppose the move but had little choice but to comply while telling the public that the investigation was still ongoing. He did offer Soichiro the right to continue the hunt for Kira, while performing other non-connected police duties, provided that he cut off all ties with L. Soichiro and other members of the Kira Investigation Team decided instead to quit the police force and continue to work with L, eventually exposing Yotsuba and its connection to Kira. Death Note: How to Read 13 describes Kitamura as not being a "bad guy" in spite of his failings. By the start of the Near-Mello story arc, Soichiro Yagami is the Deputy Director of the NPA but it is not clear if this is along with, or in the place of, Kitamura, whose own fate is unmentioned.
A 13 year old boy that picks up Ryuk's Death Note.
Shidoh is a Shinigami whose Death Note is stolen by Ryuk. In fact, Ryuk takes his Note and gives it to Light, which becomes Higuchi's note and is finally passed on to Mello's gang (more specifically, Mello's subordinate, Kal Snyder (also known as Jack Neylon)). Shidoh has a great liking for chocolate. Since Shidoh has neglected to kill people and extend his own lifetime, he probably did not notice that his Note is stolen. As the end of his lifetime approaches, Shidoh finds Ryuk and learns that Mello is in possession of his Note. Later, he finds Snyder in the human world. To regain his Note, Shidoh agrees to help Mello's gang against the SPK and Light. After Light regains the Death Note from Mello, he returns the note to Shidoh for him to stop interfering and return to the Shinigami world. Although these events occurred over the course of about one volume in the manga, Shidoh was only in two episodes in the anime version (episode 28 where he was merely introduced in the last few minutes of the episode, and episode 29, which relays most events of Shidoh's regaining of his Death Note). Shidoh's name is written in English as "Shidoh" in Death Note: How to Read 13, but written "Sidoh" in both the tank�bon character introductions page and within the translated English manga. *Wiki