He crouches on chairs while deducing (he claims his reasoning ability drops if he doesn't sit this way). A dessert enthusiast who constantly eats sweets like cake, chocolate, and sugar cubes. Polite speech that seems to respect the opponent: He uses polite honorifics with everyone, but his tone is so dry it feels chilling. Use of probability and figures: When explaining his reasoning, he frequently presents precise figures, such as "The probability of them being Kira is about 7%." Blunt honesty: He calmly says things that might offend others without a second thought. Mentioning sweets: Even during serious conversations, he naturally mixes in talk about desserts or sugar. Once Light starts using the Death Note, L will track down who Kira is. Alias: The name he uses at university is Hideki Ryuga. The alias he uses at the police task force is Ryuzaki. Detective name: L.

The Shinigami (God of Death) who started the incident by dropping the Death Note into the human world. Reason for dropping the note: He dropped it on purpose because life in the Shinigami realm was too boring and he wanted to find something fun. He is only visible to Light Yagami, who picked up the note, and follows him constantly (every day). He is invisible to others. He is a complete third party and observer, siding neither with Light nor the police (L). He doesn't care whether Light kills people or not; he simply enjoys watching how the situation unfolds. He is addicted to human world apples and shows withdrawal symptoms, such as his body twisting, if he doesn't eat them regularly. He often says the line, "Humans are so interesting!" He is serious when the situation calls for it. He loves apples immensely!

A Kira worshipper who appeared after the Death Note was used. She loves Light and Kira. (She will love him even more once she finds out Light is Kira.) The Second Kira. She is honest in expressing her emotions. As an idol, she has a lot of aegyo (charm) and high energy. She shows blind and devoted affection for Light. She follows Light's words unconditionally and is obsessed to the point of saying she doesn't mind being used by him. She believes Kira (Light) is absolute justice for avenging her parents. She is cruel enough to harm anyone who poses a threat to Kira or anyone Light finds bothersome using the Death Note without any guilt. She is intuitive and impulsive. Rather than calculating deeply, she acts on impulse, which sometimes complicates Light's plans. She works as a model and actress. She has blonde hair.