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.
He is the Vice President of Yotsuba Material Planning Division and Yotsuba Homes. How to Read 13 states that he "never had what it takes to be a true leader" and that he was selected to attend the meetings to "make Higuchi look good." The book adds that other members view Takahashi as "foolish" because he does not "seem to put much thought into his comments." He is later disposed of, along with the rest of the Yotsuba group, by Light's writing their names into the Death Note. Takahashi was formally married with children and is a graduate of Keiyo Business School. He is the son of Karazo Takahashi, the president of Japan Financial Times, and maintained a hobby in surfing.
He is the head of the Japanese National Police Agency. He was kidnapped by the Mafia led by Mello in order to serve as a hostage in exchange for the Death Note the Japanese police had in its possession. Takimura was later found dead, strangled by his own tie. Mello therefore organised the kidnapping of Sayu Yagami, the daughter of Takimura's deputy Soichiro Yagami, and held her in exchange for the Death Note. Death Note: How to Read 13 confirms that he was killed by Kira (Light Yagami), though in the manga Light himself does not openly confirm this in his thoughts or in conversation. Near and Mello themselves speculate that it could have been either Kira's doing or actual suicide.
Yuri is a young girl Light invites on a date to Space Land. He asks her out as part of his plan to help find out Ray Penber's name, so that he can write it in the Death Note. Light asks her out so that he won't arouse suspicion, since he is well aware of being followed by Penber. When the bus is hijacked by Kiichiro Osoreda, he writes a note to Yuri, telling her that he will try to attack the hijacker with a technique his father taught him. Penber sees this, and warns Light that it's too risky and to let him handle it. Light replies that he doesn't know if he should trust Penber, since it is possible that he could be the hijacker's partner. Yuri nervously questions what Light is saying, and he replies that during hijacks, there are often two criminals working together: one doing the hijacking, and the other disguised as a bystander. To prove that he can be trusted, Penber shows Light his identification, certain that Light cannot be Kira. Light, now having the information which he needs, drops a piece of paper from his Death Note onto the floor. Osoreda sees this and, as planned, picks it up and reads it, to discover that it is only date plans. When he looks up he sees Ryuk, and starts shooting him, using up all of his bullets. Osoreda then runs off of the bus and gets hits by a car, getting killed, just as Light had specified in his Death Note. Despite all of this, Yuri seems to recover, and insists on going to Space Land. Apparently she has quite a crush on Light.