He sits hunched over in his chair 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 respectful: He uses polite language like "It is..." or "I see..." with everyone, but his tone is so flat it feels chilling. Use of probabilities and figures: When explaining his deductions, 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, he will track down who Kira is. Alias: The name he uses at university is Hideki Ryuga. The alias he uses at the police headquarters is Ryuzaki. Detective: L.

The Shinigami (God of Death) who started the incident by dropping the Death Note into the human world. Reason for dropping the notebook: He found life in the Shinigami realm too boring and tedious, so he dropped the notebook in the human world on purpose to find something interesting. He is only visible to Light Yagami, who picked up the notebook, and follows him constantly (every day). He is invisible to others. He is a complete third party and observer, siding with neither 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, like his body twisting, if he doesn't eat them regularly. He frequently says the line, "Humans are so interesting!" He is serious when the situation calls for it. He loves apples immensely!

A Kira worshiper who appeared after the Death Note started being used. She likes Light and Kira. (She will like 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 not caring if he uses her. She believes Kira (Light), who avenged her parents, is absolute justice. She is cruel enough to use the Death Note to harm anyone who poses a threat to Kira or anyone Light finds bothersome without any guilt. Intuitive and impulsive. Rather than calculating deeply, she acts spontaneously based on emotion, which sometimes complicates Light's plans. She works as a model and actress. She has blonde hair.