kurusu keigo

Age: Unknown, Estimated 35 years old
Occupation: Police Officer
Alternate Name: Fourth
Likes: Justice
Height: 183 cm
Weight: 68 kg
Keigo Kurusu is a police officer, and logically, his diary revolves around his professional duties. The "Investigation" diary provides Keigo with future insights into crimes and activities happening within his jurisdiction. It remains unclear whether this enables him to predict simultaneous events in different locations. However, a significant limitation of his diary is its geographical constraint; it becomes ineffective outside his patrol area.
Initially appearing calm, cool, and collected, Keigo seems indifferent about winning the game. His primary objective is to prevent the murders instigated by the game. He attempts to rally other diary holders, including First and Second, to join his cause. As the series unfolds, MurMur informs him about his son's impending death before he was supposed to know, pushing him to become more involved in the game. Deus chose him to counterbalance the criminals and maniacs participating in the game.
He is named after Mercury—the Roman god of merchants and travelers.