Watari – L’s right-hand man and guardian. Knows L’s true identity and helps him run the logistics of his operation. (Secrets)
Soichiro Yagami – The Chief of the NPA and father of Light Yagami, Soichiro’s perseverance in catching Kira is nearly unmatched, but, like many others, he is blinded by the manipulative skills of his son. However, his strong sense of justice and duty inspire other officers below him, particularly Matsuda. He is the figurehead of the Japanese Task Force. (Secrets)
Shuichi Aizawa – Takes his job very seriously and can be rather opinionated, and thus clashes at times with Matsuda and Misa Amane. He has some respect for L, but seems to hold him in contempt. At some point, the tensions may become too high for Aizawa, and he may choose to leave the Japanese Task Force. (Secrets)
Hideki Ide – Characterized by a fiery temper and a hatred for foolishness, Ide especially does not get along with L, and refuses to abide by his methods. If he ever votes for L to be lynched, his vote that day is worth 5. Gains BTSC with Shuichi Aizawa if Aizawa quits the Japanese Task Force. (Secrets)
Kanzo Mogi – One of the most dedicated members of the Japanese Task Force, but also one of the most reserved. (Secrets)
Touta Matsuda – Enthusiastic but inexperienced, Matsuda means well but often proves a hindrance to his fellow investigators, particularly L. Although he is not convinced that Kira’s killing of criminals is necessarily a bad thing, Matsuda nonetheless remains absolutely dedicated to the Japanese Task Force. His recklessness sometimes pays off, but other times it can get him into trouble. Every night, Matsuda can decide whether to take a risk or play it safe. Additionally, if Higuchi starts killing, Matsuda can instead decide to attempt to spy on Yotsuba. If he does so, he may be able to discover the true identity of the Third Kira, but regardless of his success he may also get caught in the process. (Secrets)
Hirokazu Ukita – Perhaps the most emotional member of the Japanese Task Force, Ukita is nonetheless absolutely determined to catch Kira, and does not hesitate to demonstrate passionate, admirable bravery. (Secrets)
Near – One of two possible individuals being groomed to be the successor to L in case of disaster, Near is much like a younger version of L: socially awkward, but incredibly intelligent and cunning. If L dies, Near takes over the Kira investigation and starts the Special Provision for Kira (SPK), determined to catch Kira before Mello does. (Secrets)
Mello – One of two possible individuals being groomed to be the successor to L in case of disaster, Mello is always considered to be #2 to Near, a position he resents greatly. His intelligence is also high, but sometimes he lets his emotions get the best of him. If L dies, Mello forfeits the successor position to Near, and joins the mafia. He intends on catching Kira before Near does and will do anything to stop Near from getting ahead. (Secrets)
Raye Penber – An FBI agent who begins investigating Light Yagami when L tells him to. Has BTSC with Naomi. (Secrets)
Naomi Misora – A former FBI agent and fiancée of Raye Penber. If Raye dies while investigating Light, she picks up where he left off. Has BTSC with Raye. (Secrets)
Shingo Mido - After Higuchi has killed two victims, he invites Namikawa, Shimura, and Ooi to a secret meeting. (Secrets)
Reiji Namikawa – After Higuchi has killed one victim, he receives an anonymous phone call. (Secrets)
Suguru Shimura
Eiichi Takahashi
Masahiko Kida
Takeshi Ooi
Ryuk – A shinigami who appears to Light shortly after he discovers his Death Note, Ryuk explains that he has to stay with Light until he either dies or the Death Note is destroyed, and that he ‘dropped’ the Death Note into the human world because he was bored. As a shinigami, he cannot be harmed by humans, nor can he be seen by humans who have not made contact with his Death Note. Oh, and he loves apples. Has BTSC with Light Yagami. (Secrets)
Misa Amane (Second Kira) – A famous model whose parents were murdered by a man that Kira kills with his Death Note, Misa becomes infatuated with Kira and makes desperate moves to meet him. She thereafter becomes Light’s girlfriend, incredibly complacent to his demands. Gains BTSC with Rem when she receives her Death Note. (Secrets)
Rem – A shinigami who appears to Misa after she discovers her Death Note, Rem accompanies Misa and guards her at any cost. As a shinigami, she cannot be harmed by humans, nor can she be seen by humans who have not made contact with her Death Note. Gains BTSC with Misa Amane when she gives her the Death Note. (Secrets)
Teru Mikami (X Kira) – As a devoted worshiper of Kira, Mikami has a strong sense of justice and feels evil absolutely must be punished. He adheres to a very strict, daily schedule. (Secrets)
Kiyomi Takada – Classmate and former girlfriend of Light Yagami, Takada becomes the official spokeswoman for Kira if Demegawa dies. (Secrets)
Hitoshi Demegawa – A very greedy man who feeds off of publicity, Demegawa is director of Sakura TV. If L dies, Demegawa asserts himself as Kira’s spokesman and constantly rallies for Kira supporters to participate in various violent acts of protest. (Secrets)
Sidoh – A shinigami whose Death Note was stolen, he searches for Ryuk every night to retrieve his notebook. If he finds Mello, something happens. As a shinigami, he cannot be harmed by humans, nor can he be seen by humans who have not made contact with his Death Note. (Secrets)