Shinigami (Death Note)

In the manga series Death Note, created by Tsugumi Ohba and Takeshi Obata, are the race of extra-dimensional beings who survive by killing humans to extend their own lives. Shinigami are not responsible for every death that occurs; people will eventually die regardless of whether or not the Shinigami pay attention to them, but a Shinigami can end their lives sooner than intended for their own benefit.