Keigo Kurusu

"Worry not, I will lay you to waste."

Characteristics
Keigo Kurusu(来須 圭悟) is a fictional character from the manga and anime known as Mirai Nikki(Future diary). He is a police officer, so it follows with reason that his diary relates to his work. The "Investigation" diary gives Keigo information of future crimes and activities committed anywhere within the prefecture he is assigned to. Whether or not this means his diary can record events that will happen simultaneously in different locations is still up in the air. Its major flaw is a location issue; his diary is rendered useless at predicting anywhere outside his patrolling district.

Calm, cool and collected, Keigo does not show any interest in wanting to win the game. Unlike the other players, his participation is an effort to stop the murders that will occur if it continues. He makes an effort to recruit some of the other diary holders into his cause, but his main goal is to capture the ones too dangerous to be left roaming free. He was chosen by Deus to balance out the criminals and maniacs that are also taking part in the game.

The 9th's Attack
He appears beside Amano Yukiteru after he is thrown outside by his peers and reveals himself to be the 9ths true target and that he is the 4th. The 9th tells him to shoot Yukiteru and so he points his gun at him. When Yuno appears and distracts her, he encourages Yukiteru enabling him to go an attack the 9th. After the 9th escapes, he forms a three way alliance with Yuno and Yukiteru, the "Future Diary Alliance". Later he has Yukiteru and Yuno go to an amusement park for a day as bait for the 9th. After Yukiteru goes home he tries to contact him but is stropped by Yuno.

The 6th's Cult
He takes Yuno and Yukiteru with him to the Omekata Cult to retrieve the 9th who the cult has captured. There, he argues with a young shrine maiden about seeing the priestess. When they see the priestess, she reveals herself to be the 6th and wishes to trade the 9th for Yukiteru so that he can help her avoid her dead end. He agrees and wanders off to investigate. When the fire starts he fixes the broken pipes which starts the sprinkler system, puts out the fire which saves the 6th and Yukiteru. Later he catches the 9th after she is released by the 12th and then makes a deal for her release, for them to trade contact information.

The 5th's infiltration.
He contacts the 9th about the fact that the 5th has infiltrated Yukiteru's home and how he is hesitant to kill him since the 5th is a kid.

The 10's Trick.
Just before the 10th is shot he says, "Isn't that right, 4th" It is shown that he is the one who shot the 10th.

The 4's betrayal
He has Yuno and Yukiteru invited to the poice station where he tries to kill Yukiteru by playing russian roulette with him.Later it is shown that he has made a new alliance with the 9th who he has working at a hospital to protect his wife and child. He puts warrants out for the arrest of Yukiteru and Yuno. When they infiltrate the hospital he sends in a swat team to kill them after he refuses the 9th's terms for their escape, his wife and son for their release. After the dust settles from the light gernade Yuno releases he captures her using her as a human shield aganist Yukiteru. He is then shot by Yukiteru and they believe him to be dead. Then the 9th appears with his lietunant and he makes a deal with the 9th, the price being his life as he breaks his diary and he dies.

Trivia

 * He is named after Mercury — roman god of merchants and travelers.
 * He has a wife and a son.
 * He is involded in two different alliances; one with Yukiteru and Yuno and another with Minene.
 * He is killed by Yukiteru.
 * He is the 7th diary user to die.
 * He killed the 10th.