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.
Matt is a cohort of Mello's, first appearing in Chapter 83. He does some espionage work for him and is an accomplice in Takada's kidnapping. He follows orders without question, usually smoking a cigarette as he does. Not much else is known about him, other than he is a former resident of Wammy's orphanage. In Chapter 98, he fires a smoke bomb at Takada's bodyguards as a distraction to allow Mello to kidnap Takada; in the next chapter he meets face to face with Takada's bodyguards. Inside the back of his shirt, he hid a gun which he tried to take out until he is finally shot multiple times by all thirteen of the bodyguards surrounding him. Mello later sees the news of his death broadcast on TV and apologizes to Matt for his death. Matt's real name is Mail Jeevas (pronounced like "mile" rather than "male"); he likes video games, but dislikes going out, and Matt was behind Mello and Near to succeed L. Matt is 168 centimeters (5 feet and 6 inches) tall, weighs 52 kilograms (115 pounds), and his blood type O. His birthday is February 1, 1990. He dies on January 26, 2010. It was said that during his time in Wammy's orphanage he and Mello were very close friends and liked to cause trouble. Also it was reported that his calm demeanor and laid back attitude was the reason why he is third in line to be L. His lack of motivation and drive the only thing holding him back from being first. His intelligence matching even surpassing Mello and Nears'. (Source: Wikipedia)
Takuo Shibuimaru is the second person that Light kills using his Death Note. Shibuimaru rides a motorcycle and travels with a group of bikers, and starts annoying a woman in the street. After Light hears his name and sees him chasing this woman, Light writes his name down in all variations possibles to write his name, and uses a condition, a death by traffic accident. A truck slams into Shibuimaru's motorcycle, killing him. In the manga, Shibuimaru and his group harass the woman, while in the anime him and his group try to sexually assault her. In the manga Light feels some guilt since Shibuimaru is not a criminal. (Source: Wikipedia)
Yagami Souichirou is Light's father and the leader of the remains of his investigation team under L's command. Souichirou was responsible for successfully retrieving tape recordings of the Second Kira have retrieved from Higuchi. (Source: Wikipedia)
He is the Vice President of the United States in the manga. When David Hoope dies, Sairas becomes the President in his place. He capitulates to Kira and officially announces his support for him. In addition, Sairas leaks secret information about the SPK. How to Read 13 describes Sairas as "weak-willed" and "clearly lacking as a leader." In the anime, Sairas is President at the start.