The manga series Death Note features an extensive cast of fictional characters designed by Takeshi Obata with their storylines created by Tsugumi Ohba.[1] The story follows the character named Light Yagami, who chances upon a supernatural notebook which grants him the ability to cause the death of anyone he writes in it. Light uses the notebook he finds in order to cleanse the world of humans he has deemed unfit for society. A team of professional investigators set out to find out the mysterious killer and arrest him, and thus many other characters are introduced until Light is eventually caught.
In the fictional stories featured in the Death Note universe, Tsugumi Ohba, the story writer, created characters that lived in a world featuring a notebook in which names written on it would lead to the ones named to die, typically the cause of death being a heart attack when otherwise not specified. Ohba chose names for his characters in a way that, as he described, "seemed real but could not exist in the real world", due to the fact that most of the characters were criminals or victims.[1] Some character details differ between the manga and its anime, live-action film and drama adaptations.