Keigo Kurusu

Keigo Kurusu was a detective with the Sakurami Police Department working on the cases relating to the actions of Takao Hayama and Minene Uryuu. Keigo learned that his son was diagnosed with a terminal cancer and had only about a month to live. Shortly afterwards, Keigo was approached by a being claiming to be God and give a cell phone which could predict certain aspects of his future, Keigo's case, the actions of criminals he was investigating. Keigo is told that he has been entered in a battle to become the next god, and must eliminate his 11 opponents. Keigo is determined to kill off the other "diary holders" and gain divine power to save his son's life, at one point allying himself with Yukiteru Amano and Yuno Gasai, only to later betray them.