Akise Aru Intervention

Lore & Background

Akise Aru is a genius with amazing investigation skills who wants to be a great detective. He becomes involved in the Diary Game to learn the mysteries surrounding it and protect Yuki. Aru has feelings for Yuki that are beyond that of friendship, which angers Yuno. As the games continue, Aru becomes suspicious of Yuno and tries to find out what secrets is she hiding from Yuki. He soon discovers Yuno's origins but also his own when he learns about his creation by Deus as an "observer" to keep an eye on the contestant. In both the main series and the Paradox side-story, he receives the Detective Diary from the Eighth Diary user, Hinata Hino. The Detective Diary's ability is to combine and deduce predictions from other diaries, rather than simply predicting based on their own predictions. It is nearly a perfect diary, except when accounting for Aru's feelings towards Yuki, meaning he can act against what would be a perfect outcome. It also cannot predict actions based on information from outside its own world line, which Yuno exploits by using her knowledge from the First World. After losing to Yuno, he is killed immediately after giving Yuki the clue about Yuno's identity. In the Third World, Aru is alive and a normal human, not Deus' observer.

In Their Own Story

Aru is the protagonist of Paradox, set in an alternate timeline after Murumuru accidentally kills Yuno and Yuki is mortally wounded by Takao Hiyama. Aru and Murumuru take their respective places as First and Second until Murumuru's alterations have been fixed. However, as the game progresses, Aru sees the horrors of it and decides to save everyone to stop the game. Altering the events of the incident with Tsubaki Kasugano, Aru is able to make allies with a majority of the diary owners. However, his attempt to stop Murumuru from erasing the timeline fails when he stumbles across Yuno and how she killed her Second World counterpart, before being cast back to the start of the survival game.

Reader's Guide

Aru's investigation begins when he becomes suspicious of Yuno and tries to find out what secrets she is hiding from Yuki. He soon discovers Yuno's origins but also his own when he learns about his creation by Deus as an "observer" to keep an eye on the contestant. He receives the Detective Diary from the Eighth Diary user which can make predictions based on the predictions of the other diaries. It is nearly a perfect diary, except when accounting for Aru's feelings towards Yuki, meaning he can act against what would be a perfect outcome. It also cannot detect the difference between diaries from other universes, which Yuno exploits to defeat him. Despite losing to Yuno, he continues to help Yuki and gives him the clue on Yuno's identity before she decapitates him. In the Third World, Aru is seen alive and continues as Deus' observer, with Reisuke as his detective-in-training.

Did You Know?

• Aru Akise is the protagonist of the side-story manga Future Diary: Paradox.
• Aru is created by Deus as an 'observer' to keep an eye on the contestant.
• In both the main series and the Paradox side-story, Aru receives the Detective Diary from the Eighth Diary user, Hinata Hino.
• The Detective Diary's ability is to combine and deduce predictions from other diaries, not simply predict based on their own predictions.
• Aru's diary cannot predict actions based on information from outside its own world line, which Yuno exploits by using her knowledge from the First World.

The Nature of the Diary Game

Future Diary centers on a lethal contest orchestrated by Deus ex Machina, the deity governing time and space. This god selects twelve individuals, granting each a unique Future Diary capable of predicting specific aspects of their future. The objective is a brutal battle royale where only one participant may survive to inherit the throne of God. The narrative follows Yukiteru Amano, a shy fourteen-year-old who initially wishes merely to observe life through his cell phone entries rather than participate in violence. His ordinary device transforms into the Random Diary, which records events surrounding him but omits details regarding his own fate or potential inaccuracies due to his limited perspective. Unlike many competitors driven by ambition or malice, Yuki's primary motivation is simple survival and a desire for peace. However, the game forces him into conflict as other holders target him, knowing he is Deus's favorite candidate. The stakes are absolute; failure means death, while victory offers godhood, compelling participants to navigate a ninety-day timeline filled with betrayal, strategic alliances, and psychological warfare.

The Dynamic of Obsession and Survival

Yukiteru Amano finds an unlikely ally in Yuno Gasai, the series' second diary holder. Outwardly appearing as a perfect model student, Yuno is secretly a psychopathic yandere whose existence revolves around her obsessive love for Yuki. Her specific tool, the Yukiteru Diary, provides real-time updates on his every movement for ten minutes into the future. This information complements Yuki's Random Diary, allowing them to cover each other's blind spots and form a formidable team. While Yuki initially refuses to kill anyone, his worldview shatters after the game claims his divorced parents. Influenced by Yuno, he adopts ruthless tactics, believing that becoming God is the only way to resurrect his family. Their relationship evolves from a protective partnership into a complex web of manipulation and dependency. Ultimately, Yuki discovers Yuno's dark origins and true intentions, leading him to break free from her illusionary control. In a tragic climax, Yuno sacrifices herself to ensure Yuki's victory, leaving him to grapple with the weight of his godhood for ten thousand years until their reunion in a third world.

The Detective and the Terrorist

Beyond the central duo, the narrative features Aru Akise, a brilliant teenage detective who investigates the true nature of the game and Yuno's hidden secrets. As an ally to Yukiteru, Akise represents the intellectual pursuit of truth amidst chaos. Conversely, Minene Uryū enters the fray as a secondary protagonist and infamous atheist terrorist. Her hatred for organized religion stems from a traumatic childhood in a war zone where her parents were killed by crossfire, leading her to blame God directly. Deus intervenes when she nearly dies during a failed assassination attempt, offering her life in exchange for joining the game. Minene wields the Escape Diary, which calculates optimal routes to flee danger, though it is ineffective if no escape exists. Initially an antagonist who destroys Yuki's school and blinds his ally, she eventually becomes a protective sister figure. Her arc concludes with a heartbreaking realization that Yuki used her group as shields while allowing Officer Nishijima to die, prompting a final confrontation where she cannot bring herself to kill him.

Mythological Foundations and Character Archetypes

The twelve competitors in the Diary Game are thematically linked to Roman and Greek mythology, specifically drawing from the Dii Consentes or Twelve Olympians. This mythological framework provides symbolic depth to each character's role and abilities within the narrative. For instance, Yukiteru Amano is named after Jupiter, the Roman god of the sky, weather, and lightning, reflecting his eventual ascension to a position of supreme power over time and space. Similarly, Yuno Gasai takes her name from Juno, the goddess of love and marriage, mirroring her obsessive devotion and desire for union with Yuki at any cost. These classical allusions underscore the series' exploration of divine intervention and human frailty. The game itself serves as a modern reinterpretation of ancient myths where mortals vie for divinity. By grounding these supernatural elements in recognizable archetypes, the story examines how ordinary individuals react when thrust into extraordinary circumstances governed by capricious deities, ultimately questioning whether humanity is worthy of such power.