Aki Hayakawa

Name: Hayakawa Aki
Alias(es): Topknot (by Power), Jerk-face (by Denji)
Species: Human
Gender: Male
Age: Unknown
Height: 182 cm
Birthplace: Hokkaido, Japan
Occupation: Public Safety Devil Hunter
Affiliation: Public Safety Devil Hunters (formerly), Tokyo Division 2 (formerly)
Relatives, Taiyo Hayakawa (younger brother) (Death), Unnamed parents (Death)
Contracted Devils: Fox Devil, Curse Devil, Future Devil

World, also known as Human World or Earth is where humans reside.
The world is originally home to humans, Devils which have been killed in Hell, Fiends which are human corpses possessed
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Chapter 123 Title Page
Tokyo, Japan.
Japan is one of the countries in the world and the main setting of the series. Its official language is Japanese. It is governed by their Prime Minister who had a contract with Makima. In exchange for working for Japan, any fatal damage inflicted to Makima is redirected to any random citizen of Japan. Public Safety Devil Hunters work for the government of Japan. The higher-ups of the Public Safety Devil Hunters are headquartered in Kyoto, who are also in charge of Makima and her divisions. The Yakuza is dominant and as revealed by themselves, they are keeping foreign Mafia like the Chinese and Russian Mafia at bay.
On November 18, 1984, the Gun Devil hit Japan for 26 seconds, killing 57,912 people. Aki Hayakawa witnessed the Gun Devil destroying his house and killing his family as it passed by.

Contract is a binding verbal agreement between a Devil and a Human. It is a very important concept in the series and is fundamental for the relationship between humans and devils.
A contract is a supernatural agreement that compels its participants to fulfill its terms. Contracts can only be formed between devils and humans - two devils are incapable of forming a contract with each other, with fiends being considered devils. Contracts are binding in nature and cannot be broken on pain of death. When a devil offers a contract to a human and the human accepts, neither can go back on their word. Despite this it is implied that an "exit clause" of sorts can be added for peaceful termination of the contract, seen when the Fox Devil terminated their contract with Aki yet neither died. The formation of a contract seems to need explicit confirmation about its nature, particularly using the word "contract" in the terms. It is shown that a human may be deceived as to the identity of their contracted devil which has no effect on the contract; as long as both abide by their terms the contract is valid.
There are multiple ways a contract between a human and a devil can manifest. Some contracts only stated that the devil must do something in exchange for a price, and afterwards there is no lingering connection between the devil and the human. Others are more permanent, with the human being able to access the devil's power by paying a one-time only price or by sacrificing something for each time the devil's power is used.

Devils are a race of supernatural entities that feed upon humanity's fear and negative emotions appearing all throughout the World.
Naturally, most Devils have an innate hatred towards humanity and are extremely hostile considering their requirements to feed on the blood and fear of humans. Some, however, are relatively friendly and feed by alternative means. Some Devils, such as the Fox Devil, choose to form contracts with humans, allowing humans to borrow some of their power in exchange for a sacrifice. Other Devils outright choose to become Devil Hunters, allowing them to live in human society and buy food with the money that they make. As a general guideline, the more human the Devil looks, the more friendly they tend to behave. However, it is worth noting that Devils do not have human rights and, therefore, there are no legal repercussions if they are killed by a human. For that reason, some Devils and Fiends are coerced into helping humans out of fear of dying rather than doing it out of their own free will. Devil Hunters will sometimes capture Devils to use them for contracts, such as the Future Devil.
Contract is a binding verbal agreement between a Devil and a Human. It is a very important concept in the series and is fundamental for the relationship between humans and devils.
There are multiple ways a contract between a human and a devil can manifest. Some contracts only stated that the devil must do something in exchange for a price, and afterwards there is no lingering connection between the devil and the human. Others are more permanent, with the human being able to access the devil's power by paying a one-time only price or by sacrificing something for each time the devil's power is used.

Devil Hunters are individuals (human or otherwise) who, as the name would imply, have taken it upon themselves to fight against Devils whenever a threat related to them should arise in the world.
They tend to use contracts with Devils as a means of standing a chance in combat against their monstrous opponents, giving them a massive advantage over standard law enforcement whenever Devils appear.
Counting the Private Sector Devil Hunters, there are over a thousand Devil Hunters in Tokyo, meaning that being a Devil Hunter is considered a common profession. Devil Hunters that work for the government receive a salary regularly, just like any other government employee, while Private Sector Devil Hunters turn in bounties and do not have a permanent regular salary. Other Devil Hunters may choose to sell Devil corpses in the black market as an alternative way to make more money.
Devil Hunters will also sometimes capture Devils instead of killing them, usually for the purpose of using them to form contracts. The Future Devil is a good example of this. Devil Hunters are also the only people who are allowed by the government to form a contract with a Devil.
The Public Safety Devil Hunters, later known as The National Devil Extermination Public Safety Commission, are an organization of government-sanctioned Devil Hunters in Japan who function similarly to a Fire Department or Police Force. They're sent to dispatch Devils in the event of a threat to the public and are tasked with resolving Devil-related incidents on a smaller scale. Although the threat level of the Devils they pursue can vary, they're generally sent after bigger threats than those working in the Private Sector, according to Himeno.

To compensate the fact that Devil Hunters from the public bureau are sent after more dangerous Devils than private Devil Hunters, the government gives them more paid days off and other benefits. Despite the benefits, Public Safety, like all departments that work under the government, must also do paperwork and always give well-explained and detailed reports about their activities.
The Yakuza are a recurring antagonistic faction in the Chainsaw Man series. They are a transnational series of organized crime syndicates originating in Japan. A Mafia-like criminal organization, they are known for their strict conduct, organized fiefdom and illegitimate activity. In the context of the story, they employ vulnerable individuals to hunt Devils for them, such as with Denji, as a major business venture.

The Fox Devil is a devil that embodies the concept of foxes.
The Fox Devil's full appearance is that of an oversized arctic fox. Its head resembles a giant fox's head with multiple giant eyes covering it, each full of concentric circles. The Fox Devil's arm is likewise monstrously large with oversized claws and is covered in multiple eyes. It is colored white and in both its eyes are red-orange and glow.
The Curse Devil is a Devil that embodies the concept of curses.
When summoned, the Curse Devil manifests as a large, two-headed skeleton with horns, its right skull appears human while the left skull has three eye slits and longer, mandible-like teeth. The Curse Devil has clawed hands and a large, distended ribcage.
Whenever it speaks to someone the Curse Devil appears as a dark pair of lips hovering in darkness or as a monstrously large mouth. In the anime, this was changed, with the Curse Devil physically appearing behind the one he speaks to.
The Future Devil is a Devil that embodies the concept of the future. After seeing Aki Hayakawa's future, it made a contract with him, so he can see that future himself.
The Future Devil's lower half resembles a tree growing from the floor with branches and a trunk extending up to a humanoid body with outstretched arms and a horned head. Multiple vine-like streamers grow from its arms and chest.
Its face has three pairs of eyes stacked on top of each other vertically and its wide mouth is almost perpetually open.
The Future Devil has a large hole in the center of its chest, inside of which is another oversized eye.

Aki was a handsome, tall young man with medium-length black hair that he usually wore in a topknot style (shoulder-length with long bangs when untied) and blue eyes. In the past when he and Himeno met through Kishibe and became partners, Aki used to have shorter hair.
He often wore the Public Safety Devil Hunter uniform; a suit and tie. He also donned black earrings and usually carried his sword on his back.
Aki generally appeared to be a very stoic man who acted mature and sometimes blunt to the point of rudeness when he was with his fellow Devil Hunters, but he was actually fairly softhearted. He had a tendency to get attached to others easily, and hated to see people get hurt, especially his close friends. Unlike many of his associates, he was described by Himeno as being a "normal person", in the sense that he still grieved for those lost and had not become jaded enough to close his feelings off. Despite this, he was very determined and his primary motivation for killing the Gun Devil was revenge for his family. However, he was entirely willing to put his own life on the line to save other people, even if it got in the way of his goals.
He didn't like people who don't take their job as Devil Hunters seriously or fight for a superficial and materialistic goal like money or, in Denji's case, to be able to touch some boobs, this being one of the primary reasons he and Denji didn't get along initially. Aki was also ruthless, stating that he always makes sure the Devils he kills suffer in order to give them a slow and painful death. He could become intimidating with those he still didn't trust enough, like when he threatened Denji by telling him that if he either betrays them or sides with other Devils, he would kill him without any hesitation.

Despite this, he was very determined and his primary motivation for killing the Gun Devil was revenge for his family. However, he was entirely willing to put his own life on the line to save other people, even if it got in the way of his goals.
He didn't like people who don't take their job as Devil Hunters seriously or fight for a superficial and materialistic goal like money or, in Denji's case, to be able to touch some boobs, this being one of the primary reasons he and Denji didn't get along initially. Aki was also ruthless, stating that he always makes sure the Devils he kills suffer in order to give them a slow and painful death. He could become intimidating with those he still didn't trust enough, like when he threatened Denji by telling him that if he either betrays them or sides with other Devils, he would kill him without any hesitation. Despite being merciless, Aki still had some kindness with his fellow devil hunters, such as retrieving Denji's severed arm, taking Meowy to get medical attention, freeing Power and intentionally lying in his report to Makima in order to uncover the truth of the incident with the Bat Devil.
His air of cold detachment was a façade as he had been seen to cry over the deaths of his comrades such as Himeno and he grew to care for Denji and Power enough to try and forfeit his revenge goal in order to keep them safe.
Aki also was capable of being afraid to lose those he deeply cared about. He told Kishibe that the reason why he wanted to leave the mission to kill the Gun Devil was because of the future shown to him by the Future Devil with Denji and Power suffering a painful and terrible death, and he was scared of that future.

At first, Aki was seen to despise all Devils equally, not caring if they are Hybrids, Fiends or if they are evil by nature. To him all Devils are the same, seeing them as nothing more than tools that can be replaced at any time. However, over the course of the story Aki slowly began to bond with some of his Devil partners to the point of genuinely caring for them and wanting to help keep them alive. Aside from Denji and Power, his change of heart regarding his outlook on Devils was best shown with the Angel Devil; he initially threatened to report him for being useless and have him be executed, but would eventually not only give up two months of his lifespan to save Angel's life, but also wrote a letter of recommendation to Public Safety for Angel to be kept alive after he lost his arms

Enhanced Reflexes: Aki had extraordinary reflexes, being able to keep up with Katana Man and Devils. After making a contract with the Future Devil, Aki's reaction time was further improved. With the help of his precognition, Aki was able to dodge Reze's explosions from up close and block Quanxi's attacks.
Enhanced Durability: Aki was quite tough as he managed to survive getting stabbed by Kobeni Higashiyama, only needing Power's help to close the wound. During his fight with Katana Man, Aki was kicked into a wall with enough force to crack it and was later cut in the chest. He also survived getting choked by the Ghost Devil and even being crushed by the Darkness Devil's force to the point that blood started to come out of his mouth, however he lost consciousness in the process.
Curse Devil Contract: Aki had a contract with the Curse Devil which granted him a nail-like sword. In order for the contract to work properly, Aki must point the nail anywhere on his target's body; Then saying the word "fire", the hand of the Curse Devil will appear and flicks the back end of the nail to inflict damage. By stabbing his enemy three times with the nail, Aki could summon the Curse Devil to seize the enemy and inflict massive damage upon them, potentially killing them in the process. In order to use it, Aki's life would be significantly shortened.
Fox Devil Contract: Aki originally had a contract with the Fox Devil. In exchange for feeding him part of his body, Aki could use his power in combat by raising a hand and saying the word "Kon", causing the Fox Devil's head to appear to instantly bite down on the target's body, swallowing him whole or tearing him apart. Aki lost the ability to summon it after he used the Fox Devil recklessly against the Katana Man.

Future Devil Contract: After losing favor with the Fox Devil, Aki was taken to the Future Devil that is held prisoner by Public Safety and managed to gain a contract to use his abilities in exchange for letting the Future Devil live inside his right eye.
Precognition: Aki had the ability to see a few seconds into the future. He used this to predict his opponent's oncoming attacks and plan accordingly.
Summoning: Due to his contract, Aki could summon Future Devil by calling him. While the Devil says that Aki must say "The Future Rules" to make him come, this was not an actual requirement.
Swordsmanship: Aki was a proficient swordsman, wielding a sword as his primary weapon when fighting Devils. By using a special sword, made by the Angel Devil, Aki could harm and kill beings that are normally intangible, such as Ghosts. He was skilled enough to defeat multiple zombies and even keep up with physically superior opponents, such as Hybrids, with the help of his Devil contracts.
Hand-to-Hand Combat: As a Devil Hunter, Aki received training in unarmed combat. He displayed decent skills in boxing, being capable of easily defeating a boxer far more muscular than him.
Cooking: Aki had displayed decent skills in cooking, usually being the one responsible for Denji's and Power's meals.
Driving: Aki knew how to drive and had been seen driving vehicles, such as cars.
Strong Willpower: Unlike most Devil Hunters, Aki never gave up on his goal of killing the Gun Devil through most of the course of the story. This obsession made him willing to pay any price to achieve his goals, be it working with Devils or sacrificing most of his life span. Even after giving up his dream of killing the Gun Devil to protect his friends, he was still more than willing to make any contract to protect them. He also had great control over his emotions, being able to suppress his fear to prevent detection by the Ghost Devil, who can only see by feeling people's fear.

Enhanced Durability: The gun in Aki's forearm was surprisingly durable, being able to block multiple hits from Denji's chainsaw with ease.
Enhanced Speed: Aki displayed insane speed, being able to travel to Power's location and attack her after blasting Denji from the entrance of his apartment extremely quickly.
Bullet Projection: As the Gun Fiend, Aki could fire bullets from the gun in his left forearm and head with great precision and speed. He was able to break walls and Denji apart with ease as well as destroy multiple buildings at once.
Blood Consumption: As the Gun Fiend, Aki's corpse was able to restore his health by consuming blood.

Hybrids, also referred to as a Devil-human (real name unknown) are humans who have merged with and can take on the form of a Devil.
The real name for the concept of Hybrids was eaten and erased by the Chainsaw Devil, but Hybrids continue to exist despite their erasure for unknown reasons.
In rare cases, a human can fuse with a Devil and turn into a Hybrid. The only known method of becoming a Hybrid is via a contract or surgery, in which the Devil replaces the human's heart. The Hybrid's heart therefore becomes both their source of power and weakness.
Hybrids keep their human consciousness and appearance but can transform into Devil-human Hybrids through a trigger and manifest the supernatural abilities of their fused Devils. When transformed, the head and, in many cases, the arms are affected, while the rest of the body remains human. Although their appearance varies from weapon to weapon, most of them take on a mechanical/metallic appearance, and all of them lack lips, exposing monstrous teeth. In addition, nearly all of them lack visible eyes with the exception of the Chainsaw Hybrid whose eyes glow occasionally. When they are not transformed into Devils, they are, with the exception of their triggers, indistinguishable from regular humans, unlike Fiends.
A Fiend is a Devil that has taken over a person's corpse

We ought to use every tool at our disposal to do our jobs - even Devils and Fiends. But enemies are enemies... we're only using them. I have no intention of getting friendly with one.
Whatever happens, I want Denji and Power to survive... and be happy... My brother's death was my fault. I want the strength to change things this time...

Tokyo Special Division 4 was a special subdivision within Public Safety created by Makima as an experimental unit, which later came under the command of Captain Kishibe.
The composition of this division is different from other divisions, consisting of Fiends, Devil Hybrids, and humans alike. Many of them are outliers and are considered powerful, yet disposable by Public Safety due to their nature.

Aki Hayakawa is the deuteragonist of the Public Safety Saga. He was a Public Safety Devil Hunter working under Makima's special squad who had contracts with the Curse Devil and Future Devil, and a former contract with the Fox Devil.
During his childhood, Aki lived with his parents and younger brother Taiyo Hayakawa. On November 18th, everything changed when the Gun Devil appeared during an American terrorist attack involving guns. While waiting for Taiyo to fetch his gloves so they can play a snowball fight, Aki witnessed his family getting brutally killed in the crossfire. With his life changed forever, Aki would swear revenge on the Gun Devil for killing his loved ones.
As he grew older, Aki joined Public Safety with a strong desire to finish off the Gun Devil. It was at this point where Aki would be partnered with Himeno after being introduced to her at a graveyard by Kishibe. He learns that Himeno had recently lost her fifth partner, and is told not to die like the others have. From that point on, Aki and Himeno would work together on several missions while forging a strong bond as the two became buddies over time.
Himeno taught Aki how to smoke, made him pierce his earrings, as well as trying to convince him to leave Public Safety for his own safety. He would also work under Division 2 before being transferred to Special Division 4. Unbeknownst to Aki, the Gun Devil was already defeated a long time ago and was separated into different segments across different countries. Regardless, Aki continued working under Public Safety as long as it got him closer to killing the Gun Devil when the time had come.
On Denji's first day as a Public Safety Devil Hunter, Makima introduces Aki as his senior and tells him to work with Hayakawa for that day. While patrolling the city, Aki slowly becomes annoyed with Denji asking whether Makima has a boyfriend.

This leads to Aki pushing Denji into an alley to beat him up, as a warning that if he doesn't take Devil Hunting seriously, he could end up dead. Aki bluntly warns Denji to leave for his own good before turning to leave.
In an unexpected moment, Aki is repeatedly struck in the groin from behind by Denji, who states that he would risk his life to continue living the way Makima had shown him. Aki proceeds to slug Denji in return and tells him Makima would never have interest in a thug like him before collapsing from being kicked in the groin too many times. Once they return to the Public Safety Headquarters, Makima assigns Denji to Special Division 4 while arranging him to live with Aki in his household.
Although reluctant at first, Aki takes care of Denji despite feeling annoyed towards his new coworker's carefree way of living. One day, the two go on a mission to hunt down a Fiend. After witnessing Denji kill the Fiend by heading it, Aki asks him why he didn't transform to finish the job. Aki lectures him not to show Devils any form of sympathy, as his own family was killed by one. Denji explains his reasons, including wanting to make friends with someone as he doesn't have any friends. Shocked, Aki leaves not before telling Denji he'll remember his reasons. Aki is later present when Makima introduces Denji to his new buddy: the Blood Fiend Power.
While Denji and Power are out on patrol, Aki drives Makima from her meeting with her superiors. In the car, Makima explains to Aki the reason she is intrigued by Denji at the moment is due to his ability to transform into Chainsaw Man. While struggling to handle Power's chaotic demeanor, Denji recalls they were put together by Aki's recommendation. This causes Denji to become furious, believing that Aki is purposely trying to get him fired.

During the aftermath of the Bat Devil's defeat, Aki and his squad arrive just as Denji is about to be devoured by the Leech Devil after being impaled by her tongue. Aki saves Denji by summoning the Fox Devil, who quickly emerges to swallow the Leech Devil whole. Once the Leech Devil is handled, Aki gives out orders to his teammates while escorting Denji to the hospital.
Once Denji recovers in his hospital bed, Aki explains that Devil Hunters are able to form contracts with Devils by giving parts of their body away in exchange for helping them fight. Aki also reveals why he can use the Fox Devil by revealing that he gave part of his skin away. Though, Aki expresses disdain towards Devils, claiming they can't be trusted, and threatens to report Power and Denji should they not obey his orders as their superior.
Denji happily complies and the two agree to keep Power's treachery a secret to prevent her from being executed. Aki heads outside Denji's room, where he sees Himeno guarding a handcuffed Power. Himeno tells Aki that Power is his responsibility, to which he tells his buddy that as Devil Hunters, they will use every tool in their disposal for their job, even Devils and Fiends. He then bluntly mentions that he would never be friends with a Devil. Before heading home, Aki reports to Makima on Denji and Power's progress. The next day, Power moves into Hayakawa's apartment with Meowy and starts causing trouble. Both Aki and Denji become increasingly frustrated by Power making unnecessary demands in the household.
On a daily mission together, Aki and Himeno extract a piece of the Gun Devil's flesh from the Fish Devil's corpse. While Himeno wonders if the Fish Devil ate the flesh or was given it, Aki tells her their mission is still the same: to track down the Gun Devil no matter the cost. Makima later sends Aki and his teammates to collect more pieces of the Gun Devil's flesh, starting with the Eternity Devil located at Hotel Morin.

As the group approaches the hotel, Denji and Power begin mocking Aki as they do not take the Gun Devil issue seriously. Aki quickly silences the two with gum but Hirokazu Arai voices his distrust towards the two, to which Aki agrees due to being pranked by the two earlier in the morning. Himeno disperses the tension by making an offer that whoever kills the Devil lurking inside the hotel earns a kiss from her. Once inside, the group begins searching through the corridors of the hotel. While walking, Aki and Himeno discuss whether their teammates will survive this mission, to which Himeno reminds him not to die.
Eventually, the group comes across a small Devil, which Himeno and Power handle with swift ease. Continuing up until the eighth floor, Arai notices the group is supposed to be at the ninth floor. Upon further investigation, Aki learns that they are trapped in a moment of time by an unknown Devil's ability. After informing the group of their situation, Aki continues exploring the eighth floor until discovering that their target has grown larger by feeding on the increasing fear from the Division 4 members. In the flesh, the Eternity Devil offers to set the group free in exchange for Denji's heart.
Aki and Himeno try devising new ways of handling the current threat but to no avail, nothing seems to work. The situation becomes more desperate as the Eternity Devil eventually expands in power no thanks to the rising fear of Kobeni Higashiyama and Hirokazu making it stronger. The Eternity Devil then pursues the group, tilting the space they're trapped in and transforming the corridor into a tunnel that leads into his mouth. Ready to engage in combat with his sword, Aki asks for permission from Himeno, who restrains him and apologizes to Denji, as Arai and Kobeni prepare to kill him. Aki breaks free and shields Denji from the stab, receiving an injury in the process.

While Denji tells Power to slow down Aki's bleeding, Himeno has an emotional breakdown over seeing Aki hurt and frantically asks him what they should do. Deciding to take matters into his own hands, Denji jumps down to face the twisted monstrosity and tells Aki that they'll call it even if they manage to survive. For three days straight, Denji tortures the Eternity Devil until it reveals its weak point with assistance from Himeno and the Ghost Devil. While that happens, Aki rests in one of the eighth floor's beds. Once the Eternity Devil is taken care of, Aki asks Himeno how long it has been, to which she answers it's been three days since then. Resting for the time being, Himeno climbs into the bed and cuddles with Aki before the group recovers later on.
Sometime after the incident, Aki and Himeno retrieve the piece of the Gun Devil from the Eternity Devil's body. Outside the building, Aki and Denji are escorted to the hospital for recovery by Power and Himeno. Later on, Aki and Himeno discuss throwing a party for the entire 4th Division in celebration of their successful mission, although Aki suggests doing it before next week as Makima will head to Kyoto then. At the celebration party, Aki attempts to bribe Makima for more information on Denji, with her stating that she will tell him if he is able to outdrink her, which he and Himeno fail to do.
Aki, Denji, Power, and Himeno eat out at a ramen shop, unaware that Public Safety is under attack by members of the Yakuza. While eating their food, a man with sideburns starts talking about his backstory, with Aki asking Denji if he knows him. Once the man reveals he is working with the Gun Devil, he starts shooting at the group. Power uppercuts the Yakuza with a swift blow to the chin, allowing Aki to follow up by summoning the Fox Devil to swallow the man whole.

As the restaurant is in ruins from the Fox Devil destroying it, Aki sees both Denji and Himeno fatally wounded from their injuries. Just before Aki can process the situation, the Yakuza transforms into a Devil-Human Hybrid with the power of the Katana Devil and breaks free from the Fox Devil's grasp.
Seeing that the situation has escalated, Aki tells Power to check on Himeno while unsheathing a large nail-like sword to fight the new adversary. In battle, Aki manages to pierce Katana Man three times, not before asking the Curse Devil to finish him off. The Curse Devil restrains Katana Man and seemingly kills him. Afterwards, before Aki can focus on Himeno's safety, Akane Sawatari suddenly shows up and revives Katana Man back to full health. Aki braces himself but is swiftly slashed through the chest by Katana Man's blades, leaving him in fatal condition as he collapses to his knees. Before Katana Man can finish Aki off, Himeno sacrifices her life to save him via giving all of herself to the Ghost Devil. Aki can only watch as Himeno smiles back at him, telling him not to die and hopes he can cry for her once she dies. After the Ghost Devil is killed by Akane's Snake Devil, Himeno's entire body vanishes, leaving nothing but her clothes and eyepatch behind. Aki is left in a state of devastation and silence before losing consciousness.
Sometime after the attack, Aki reawakens in a hospital bed and sees Denji and Power next to him reading manga. Denji reveals that Kobeni and Madoka survived, though Madoka resigned. After the two leave him with some apples, Aki takes his sword and asks the Curse Devil how many years he has left. The Curse Devil tells him that he only has two years left. Aki takes a cigarette, and as he tries to use the lighter, he remembers Himeno and begins to break down in tears. Shortly after, Tendo and Kurose visit Aki and introduce themselves as career coaches who came per Makima's request.

Because of his loss of the Fox Devil due to getting on his bad side and his limited use of the Curse Devil's sword, Aki is told that he must make a contract with a stronger devil if he plans on continuing devil hunting. Aki states that the one who killed his family and the one who killed his friends are still alive, so he can't quit. A woman then enters, surprising Aki.
The day after, Tendo and Kurose take Aki to an underground special facility, where Public Safety locks up devils they capture. Kurose then recalls seeing the girl that entered Aki's room after them and wonders if she is his girlfriend. Aki explains it was Himeno's sister, who gave him Himeno's letters to her family. Reading them, Aki saw that Himeno was thinking about how to make Aki quit. They take him to the cell holding the Future Devil. They warn Aki that two people have a contract with him; one gave half of their life span, while the other gave it their eyes, senses of taste, and smell. Aki then enters the cell and faces the Future Devil. The Future Devil tells Aki to stick his head into his gut, which he follows. After a few moments, the Future Devil laughs and states he wants to live in his right eye, and that way, he will grant him his power. Future Devil explains it is because Aki will die in the worst possible way. Before he can say anything else, Aki stops the Future Devil, as he is uninterested, and tells him to get in his eye.
While driving him back to HQ, Kurose criticizes Aki's goal of killing the Gun Devil. Aki doesn't care what they say and tells them to sit back and watch, and if he ends up dead, they can laugh at him. After dropping Aki off, Kurose tosses him a cola and states that even though Aki pisses him off, he is rooting for him and warns him to be careful. On the day of the hideout raid, Aki asks Kishibe the plan on taking down the Yakuza, to which the veteran Devil Hunter informs him that every Special Division member is going all out inside the building.

Aki and his squad enter the building and begin taking down multiple hordes of the Yakuza's zombies. After slicing through several zombies, Aki is approached by the Angel Devil, who asks him if he can borrow a tissue to clean himself up. After giving him one, a Yakuza man attempts to shoot the two but the Angel Devil enlarges one of his wings to shield themselves from harm. Aki swiftly knocks the man down and asks the Angel Devil to bring him outside. Meeting back with his other teammates, Aki informs them to split up to take down their main targets: Katana Man and Akane. Aki reaches the fourth floor, where he faces more of Katana Man's henchmen. However, all of them bleed from the nose and collapse to the ground due to Makima using her powers elsewhere. Regardless, Aki eventually finds Akane waiting for him. Aki braces himself as Akane is revealed to have Himeno's Ghost Devil in her possession not before sending it to kill him.
Despite tearing through most of the Ghost Devil's hands, Aki is soon overpowered and nearly strangled to death. As he is strangled, Aki fondly recalls the time Himeno gave him his first cigarette while dining with him. He is then released and given a cigarette reading "Easy Revenge!" by the Ghost Devil. Realizing what this meant, Aki calmly recomposes himself and beheads the Ghost Devil, promising Himeno that he will meet her again in the afterlife soon. Shocked by this, Akane attempts to use her Snake Devil but is held at knifepoint by Kobeni sneaking up behind her.

Aki later finds Katana Man restrained by Denji near a bullet train. Reporting that the mission was a success, Aki is ready to take Katana Man into custody but Denji proposes a tournament as payback for Himeno's death. Although he initially disagrees, Aki takes a look at the cigarette again and decides to join in. With that, Aki and Denji happily bond over striking Katana Man's groin to make him scream in agony for the deaths he caused. While enjoying his time with Denji, Aki wonders if Himeno can hear their requiem for her. In the aftermath of the battle, Aki, Denji, and Power return to their apartment to celebrate their victory with a huge feast. Sometime after dinner, Aki goes to his balcony and decides to smoke using the cigarette given to him by the Ghost Devil.
The next day, Aki is partnered with the Angel Devil by Makima. Before being sent on patrol, Aki learns what the Angel Devil is capable of, including his power of turning the lifespans of those he touches into weapons. While on patrol, Aki reprimands the Angel Devil for being lazy and apathetic. Later on, after Aki slays the Pig Devil, he and the Angel Devil discover a fatally wounded Civilian Devil Hunter inside the target's stomach. Aki tells the Angel Devil to put the Devil Hunter out of his misery, to which he refuses as he believes humans should die in pain. With no other choice, Aki pierces his sword through the Devil Hunter, not before telling the Angel Devil that he can't pretend to get along with him.
On one of their patrols, it begins to rain, forcing Aki and the Angel Devil to take cover. At the same time when Reze asks Denji if he prefers the town mouse or the country mouse, the Angel Devil explains to Aki the same fable. Aki learns that the country mouse gets to live in safety but doesn't get to eat delicious food like the ones in the city.

On the other hand, while the town mouse receives more luxuries, they have a higher chance of being killed. That being said, the Angel Devil admits to Aki that he prefers being the country mouse to avoid being further involved in the dangers of the town mouse.
The following night, Aki spends time with his old coworkers at Division 2's headquarters. Upon finishing a sparring match, Aki is approached by his friend Nomo, who asks him to rejoin Division 2 someday. While heading out, the Angel Devil questions Aki on why he hadn't told Nomo that he is going to die eventually. Even when learning that Power was the one who told the Angel Devil when he'll die, Aki tells his partner to keep it to himself.
The Angel Devil laments on having to continue working while remarking that Aki is fortunate to die so young. Suddenly, Nomo alerts Aki and the Angel Devil of Beam arriving with an unconscious Denji. Beam informs the Devil Hunters that the Bomb Devil is arriving and is allied with the Gun Devil. Before he can get any more answers, Reze approaches the entrance of the building, preparing herself to attack. Division 2 decides to hold off Reze while Aki takes Denji to safety alongside Beam and the Angel Devil.
Inside his car, Aki instructs both Beam and the Angel Devil to feed Denji some blood. Before he can drive off, Reze stops the group and presents her brutal massacre of Division 2 with the decapitated heads of Nomo and the Vice Captain. Despite this, Aki drives off into the nearby city while the Violence Fiend Galgali and Kobeni arrive to stall Reze for the time being. With no more distractions, Reze catches up to Aki's group and lands onto a truck in front of them. Denji soon recovers and transforms to fight Reze despite Aki telling him not to. Aki also warns Denji not to be so gullible towards Reze's claims of liking him before the two Hybrids clash.

In the aftermath of the explosive battle, Reze incapacitates Denji by repeatedly blowing him up to prevent him from regenerating. While this happens, Aki blends in with other injured civilians as Reze is about to make her escape. Sneaking up behind the Bomb Hybrid, Aki quickly slices Reze's arm off and frees Denji from her grasp.
Reze retaliates by launching a barrage of punches and explosives, to which Aki frantically dodges thanks to his contract with the Future Devil. Before Reze can strike Aki, Galgali arrives to save him. Seeing that she is outnumbered, Reze calls in the Typhoon Devil and the two begin causing havoc throughout the city. Denji manages to recover and utilizes a new strategy to counter Reze involving him using his chains to ride Beam's shark form.
As Denji and Reze engage for a rematch, Aki and the other Division 4 members can only watch the explosive battle raging on. Aki notices the Angel Devil about to be sucked right into the swirling flesh of the Typhoon Devil and grabs him by the shirt. The Angel Devil tells Aki that it's fine to let him go, as he wants to die anyway.
Aki refuses and instead pulls the Angel Devil in an embrace to protect him from further harm. Bewildered by Aki's decision, the Angel Devil questions him why he bothered saving him. With a solemn expression, Aki tells his partner he doesn't want to see anyone he cares about die in front of him anymore. This action also reduces Aki's lifespan to just two months remaining.
In the aftermath of Reze's attack, Aki and Kishibe are present at the cleanup scene where Denji and Reze's battle took place. Kishibe informs Aki of an urban legend regarding the Soviet Union and confirms Reze was one of the kids the Soviets forcibly experimented on to serve the government's purposes.

Following the previous event, Makima informs Aki, Denji, and Power that she will be taking them on a paid vacation to Enoshima. This is quickly canceled the moment she also announces that Denji will be placed under heavy protection due to his battle with Reze has exposed him worldwide. Assassins from all over the world will be targeting Denji for his heart. On their way out, Makima asks Aki to be part of Denji's protection squad and informs him that he will also be placed on the operation to battle the Gun Devil next year.
While having lunch with the Angel Devil, Aki is informed that all Devils have an endless cycle of death and rebirth; they can always come back to life in another form as long as their name is still feared. In addition, the Angel Devil further explains that Devils who die on Earth are sent back to Hell, where they are slain and then reincarnate back on Earth with no memory of their previous life. Most importantly, Aki learns from the Angel Devil that every Special Division Devil and Fiend remembers the sound of chainsaws buzzing before dying in Hell in their previous life.
On the night before the assassins arrive in Japan, Aki finds Denji pondering about who Pochita is and why everyone wants to claim his heart. Sitting on the young teenager, Aki reminds Denji that once the situation is dealt with, then they can all go on the postponed trip with Makima. [44] Aki soon joins up with Denji's protection squad the next day.[45] The group patrols for a while until Denji discovers that Public Safety is using him and Power as bait to lure out the assassins. Aki then proposes a deal that the three of them go to Enoshima and Power can suck Denji's blood dry in the aftermath of the battle.

Hell is the location where Devils originated. They return to hell after they die on Earth. The embodiment of the concept, the Hell Devil, can transport individuals to hell from Earth and vice versa. Two more Devils have been shown to have this ability, that being the Falling Devil and the Aging Devil.
One portion of Hell appears to be a grassy, ​​flowery field with hills, with countless doors parallel in the sky. Other areas of Hell appear to be mostly featureless with it being mostly void of light, giving it the appearance of an endless black void.

During the all-out battle, the group manages to dispatch the Three American Brothers and most of Santa Claus's dolls as they ascend a shopping mall. However, Kishibe's old buddy Quanxi overpowers every Public Safety agent guarding Denji, with Aki barely managing to defend himself and the Angel Devil using a vision from his future sight. Kishibe and Beam intervene, which allows Denji to escape. Aki and the Angel Devil regain consciousness just as Santa Claus uses her contract with the Hell Devil to send everyone inside the mall to the depths of Hell.
Aki and Public Safety form a temporary truce with Quanxi to find a way out of Hell. Unfortunately, the Darkness Devil arrives at their location and nearly kills everyone one by one. Upon seeing Power brutally wounded, Aki remembers seeing Himeno's final moments before her death. Not willing to lose someone he cares about again, Aki can only stare as the Darkness Devil looms right in front of him after rendering the Angel Devil unconscious.
Bleeding, Aki collapses to the ground just as the Darkness Devil prepares itself to finish him off. Using Princi to transport herself to Hell, Makima intervenes and rescues the group by controlling Tolka to offer all of himself to the Hell Devil to send everyone back to Earth. Aki remains unconscious while a rejuvenated Denji and Quanxi battle Santa Claus, who is now powered by darkness itself. Once all assassins are dealt with, Aki is taken to recovery alongside the remaining agents of Special Division 4.

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