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.
A professional con-man, Aiber is hired by L for his skills. He was proven helpful in playing the role of Eraldo Coil in the Yotsuba Arc, and in coaching Misa for her interview with the Yotsuba group. He died from liver cancer on 7 April, 2005. Aiber is also known by his initial "A", just like "L" and other people who have great influence in the organization that hunts down Kira.
Namikawa is the Vice President of Sales. He initially encourages the Yotsuba Kira. After receiving a telephone call from Light he ceases participation and observes the scenario. How to Read describes him as the "most talented" of the board members who has the potential to "make it to the top" without Kira. He has a talent in shogi at the professional 4-dan level. How to Read 13 states that he detests useless subordinates.
Hirokazu Ukita is the most emotional of the Kira investigation team that is lead by L. When Misa Amane has Sakura TV broadcast a message from her as Kira, Ukita rushes to the station to stop the broadcast, without any prompting by the rest of the team. Since Misa has the Shinigami Eyes, she kills him as soon as he approaches the door and is about to shoot. He is voiced by Hidenobu Kiuchi in the Japanese anime and Jeremy From in the English dub. In the film, he is portrayed by Ikuji Nakamura, and appears notably older. Ukita does not die in the film.
Hideki Ide is one of the few police officers who remains with Soichiro during the Kira Investigation. He initially leaves when he disagrees with L's methods. Ide later returns and plays a relatively minor role in the Kira investigative team. He helps coordinate their efforts, and performs actions such as organizing a blockade of police cars to trap Higuchi. Later, after L's death, he rejoins the investigation, though he states that he only did so to be with Aizawa. Ide trusts Light more than any of the other Task Force members, except for Light's father.
She was the class president in the last grade of high school, in the same class as Sid and Fuwa. An honest and responsible girl. Also she is a very powerful esper. 5 years prior the novel events she destroyed a large meteor that was going to fall on Earth. But she doesn't like to use her powers frequently. She thinks that mind reading is an invasion of privacy, thinks of clairvoyance like a spoiler of a book and doesn't use teleportation because she likes walking and riding on trains.