Keigo Kurusu is a police officer and the head of the detective division at Sakurami Police Station. He is one of the main characters in "The Future Diary" manga. Kurusu is married and has a son who suffers from a difficult illness. His special diary, called the "Investigation Diary," allows him to see future police investigation details within Sakurami City. Kurusu joins the deadly diary game to stop the murders, but his son's sickness makes him change his priorities. Although he starts as an ally to Yukiteru Amano and Yuno Gasai, he later becomes an enemy when he tries to save his son at any cost.
No information about Keigo Kurusu's appearance is in the original content.
Kurusu is calm, friendly, and trustworthy. He is known for his strong sense of justice and his cool-headed nature, especially compared to his more intense allies. He is very approachable and often acts as a reliable teammate. Even when things get tough, he thinks things through carefully.
Kurusu works at Sakurami Police Station as the head of the detective division.
He is married; his wife works at a wedding hall.
His son is hospitalized with a serious illness.
As a child, Kurusu once stole a model kit and was punished by his father, which made a big impact on him. This event influenced him to become a police officer, because he wanted to make sure people like his father were punished for their wrongdoings.
Investigation Diary
Kurusu owns the "Investigation Diary," which predicts the future status of police investigations involving him.
The diary is very powerful because it can show information about most crimes happening in the city, especially ones that involve other diary owners, terrorists, or criminals.
However, the diary cannot give information about people not involved in crimes, or about anything outside Sakurami City.
If Kurusu loses his police authority, the diary becomes useless.
- Yukiteru Amano: Kurusu first promises to protect Yukiteru, standing out as an early ally.
- Yuno Gasai: Kurusu works together with Yuno, especially during the early parts of the game.
- Minene Uryuu: Kurusu fights Minene at first, but later shares information with her for unknown reasons and eventually trusts her with a very important task.
- Masumi Nishijima: Kurusu's loyal subordinate.
- His Family: Kurusu has a deep concern for his wife and son, with his son's illness greatly changing his goals during the story.
Trying to Stop the Survival Game
Kurusu, guided by his sense of justice, cannot overlook the diary game, which leads to many murders. He joins to try to stop the game and protect innocent people.
Building the Future Alliance
After Minene Uryuu attacks Sakurami Middle School, Kurusu teams up with Yukiteru Amano and Yuno Gasai. The three defeat Minene together, forming a team called the "Future Alliance."
Working with Minene
Later, after the incident with the Omekata religion, Kurusu starts secretly giving Minene information from his police work, but his true intentions are hidden even from her.
The Choice to Save His Son
Everything changes when Kurusu learns that his son only has three months to live. Desperate, he decides to win the diary game and become a god to save his son, turning against Yukiteru and Yuno. He frames them for the murder of Karyuudo Tsukishima and chases them into the Sakurami City Hospital.
Downfall and Final Moments
Kurusu is seriously wounded by Yukiteru's gunshot. Because of Minene's statements, he loses his right as a detective, making his diary useless. Kurusu asks Minene to take care of his son and destroys his own diary, disappearing as a result.
In the Third World
In the third world, thanks to information from the second-world Minene, Kurusu is able to get early treatment for his son. Two years later, he lives happily with his family, free from the pain of loss.
- Kurusu is the only diary owner who is married and has a child.
- He once tried to steal an "Recon Zaku" model as a kid.
- His name “Keigo Kurusu” is inspired by the Roman god Mercury (Mercurius), who is the god of messages, business, and thieves. It's a funny twist because Kurusu is a police officer, but is also clever and once committed theft as a child.
No additional relevant information was included.
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