Ōchi Fukuchi (福地 桜痴, Fukuchi Ōchi?) is the commander of the Hunting Dogs special units and has the ability Mirror Lion. However, in reality, he is the leader of the terrorist organization, the Decay of Angels, acting under the alias of Kamui (神威, Kamui?).
Fukuchi is a tall, middle aged man donning a dark-colored military uniform, complete with a sword and tall black boots. He has a light, spiky hair with some strands falling in front of his face, along with an upwards mustache. On his right cheek are three distinct healed scars that almost resemble claw marks.
On the surface, Fukuchi has presented with an eccentric and boastful personality. He took great pride in the Hunting Dog unit's skills and reputation and seemed to enjoy the thought of "hunting down" criminals. He also showed a somewhat vulgar and shameless side to himself including doing disgusting things including farting, vomiting from drinking too much liquor, and stating he was still youthful by remarking his skin was still peachy on his behind. Despite this, he also showed examples of being a charismatic leader who was able to heavily influence people of all kinds.
His true personality as Kamui, however, has proven to be darker and more serious than the personality he had been faking as the commander of the Hunting Dogs. As Kamui, Fukuchi still retains some of his laid back personality, however, he expresses bitterness in getting older admitting his drinking was a form of relieving his stress and he loathes that his hair is getting thinner. He also expresses relief that he will no longer have to fake such a tiring personality after the final step of the plan commences. In this personality, Fukuchi also acts more like a ruthless soldier as he challenged Atsushi Nakajima in combat with the full intention of eliminating him, though he still retains some form of honorable code as he also allowed him a fair chance between "fighting or dying" in order to grab the Page from his clutches.
Fukuchi's ability, Mirror Lion (鏡獅子, Kagami Jishi?) allows him to strengthen any weapon he holds by a 100 fold. He demonstrated this when he cut off Atsushi's leg with his augmented sword with tremendous speed and power.
|Mirror Lion (鏡獅子, Kagami Jishi?)|
|Manga Debut:||Chapter 83.5|
- Espionage: Fukuchi is a tremendously skilled actor and is able to fake a personality to the point, someone, with high observation skills as Ranpo Edogawa is unable to tell he is lying or hiding an ulterior motive without fully using his Super Deduction technique. Although his skills are impressive, Fukuchi has admitted he has become rusty and chalks it up to his age. Back in his army days, he was known as the "Man of 100 Faces" (百面相の男, Hyakumensō no Otoko?) due to his legendary skills in infiltration and espionage.
- Physical Prowess: Fukuchi is also well-versed in martial arts. Like Fukuzawa, he appears to be proficient in performing the kote gaeshi (小手返, lit. "forearm return"), a throwing technique in aikido that uses an opponent's momentum against them.
Fukuchi has known Yukichi Fukuzawa since their youth, and they both learned the way of the sword from the same government-run school of martial arts. They also had a mutual female acquaintance named Kin during this time. Being fondly referred by Fukuzawa as Gen'ichirō (源一郎, Gen'ichirō?), they seemed to have had a friendly yet harmless rivalry over the years and were each other's best friend for quite some time.
However, 14 years ago, Fukuchi enlisted in the Japanese army to fight in the Great War where he experienced horrendous traumatic events, including engaging in brutal combat with the enemy lines and torturing and killing soldiers, civilians, women, and children in gruesome ways under the government's command. These experiences led Fukuchi to believe he was "born on the battlefield" and held a grudge against the nation and the government for creating the hell that was war. He also held resentment for Fukuzawa for not joining him on the battlefield and experiencing the horrific events he did and stated it was the reason he and Fukuzawa split paths forever. 
Despite these facts, 12 years ago, he was invited to the opening of the Armed Detective Agency where he drunk himself silly, caused a ruckus, and urinated all over the newly made Agency doorplate which Ranpo saw and was disgusted by. Despite the shameful actions, Fukuzawa interpreted them to be a sign of grief and wailing that he had found his life's purpose one step ahead of him and that he was lonely because of that fact. It was on this day that Fukuzawa told Ranpo that he trusted Fukuchi more than anyone in the world, which reinforced Ranpo's trust in him based solely on blind faith alone, while Fukuzawa was completely oblivious to his friend's hatred and bitterness towards him.
Sometime later, Fukuchi became the commander of the Hunting Dogs and a world-renowned hero for completing difficult and high-risk missions including defeating werewolves created by an Abilities experiment, saving refugees, fighting an undead ability user nonstop for several days and nights, and taking down vampire armies.  At an unknown point in time, he became Kamui, the leader of the Decay of Angels.
|Are you prepared to handle the spoilers ahead?|
Fukuchi arrives with his fellow Hunting Dogs as reinforcements to capture the Armed Detective Agency, who have been identified to be the Decay of Angels. After their arrival and later being recognized by the military police as the legendary Hunting Dogs, Fukuchi discusses their methods to track down the Agency. Since the Agency are adept with tracking down criminals, Fukuchi knows that they shall use that knowledge to their advantage in outwitting the Hunting Dogs.
Faced with a dilemma of whether to take the northern or the southern paths, the Hunting Dogs split into two teams: Fukuchi and his vice commander Teruko Okura are assigned to the northern station, while Saigiku Jōno and Tetchō Suehiro are to take the southern road in an attempt to catch the Agency. Sometime during their operation, Fukuchi and his fellow Hunting Dogs are requested for dispatch having found the Agency, with Michizō Tachihara rejoining them as the undercover fifth Hunting Dog and cornering Yosano that leads to her arrest.
Later, Fukuchi pays a visit to Fukuzawa, who is under interrogation. Having some liquor, the two childhood friends joyfully chat about their respective lives and responsibilities. Fukuchi then sternly asks for Fukuzawa's confession in exchange for bringing a halt to the hunt for the Agency members. The President kindly refuses, and Fukuchi suddenly waves his blade only to stop an inch from cutting Fukuzawa's manacles. Indeed, Fukuzawa planned to free himself this way before taking Fukuchi's sword. The commander of the Hunting Dogs then praises his swordsmanship, wondering if someone who's able to draw a sword at the speed of sound like Fukuzawa is human.
When Fukuchi tries to bargain over information about Doppo Kunikida's whereabouts, Fukuzawa declines the deal once again: he deeply believes that Kunikida is still alive; otherwise he would have felt it. Fukuzawa also has absolute faith in every one of his subordinates, while Fukuchi mutually believes in his very own subordinates.
After the interrogation, Fukuchi is asked by United Nations delegates to become the leader of an anti-terrorism force meant for the entire world, but he is too hungover to properly listen. Tetchō excuses the commander's state and assures them that he has concocted a drink to ease his inebriation. As Fukuchi learns what ingredients were in Tetchō's drink, he vomits again out of disgust. Soon after, Fukuchi sobers up, apologizes to the delegates, and lets them resume the conversation.
As he is told of the prospect of establishing a global anti-terrorism force, Fukuchi is sought to flush out the Armed Detective Agency terrorists and to commandeer their proposed project to bring forth a new era of "unified justice". However, Fukuchi rejects their notion for believing that the Agency are actual terrorists and issues a condition to change the situation.
Fukuchi arrives at Standard Island, where various international envoys congregate to discuss the foundation of the global anti-terrorism forces. Fukuchi addresses their need for a special kind of army to combat the new era's evil toying with the world's safety, naming the troop as the Humankind Army that shall comprise the world's armed forces. Afterwards, Fukuchi heads to his chamber and encounters Ranpo who compliments his charming speech, much to Fukuchi's shock.
After Fukuchi instructs security not to allow anyone in his room for five minutes, he and Ranpo exchange pleasantries ever since the Agency's founding. Ranpo then tells him that the President has ordered him to negotiate and join forces with Fukuchi to battle the Decay of Angels. Fukuchi shuns the supposed great detective's absence of any bargaining chip with him, only for Ranpo to quip that he can deduce his possible responses and even psychologically manipulate him, but he chooses not to out of trust for the President, similar to how the latter wholly trusts Fukuchi. Moved with his words, Fukuchi asks Ranpo to come with him.
They head to the Boswellian, a special passenger ship nearby, to get them out to safety. As Ranpo regroups with an onlooking Atsushi, the former casually teases Fukuchi, though the latter retorts that he is merely jealous with Fukuchi's spent time with Fukuzawa since their youth. Eventually, with Atsushi's curiosity towards Kamui, Ranpo brings out his glasses and deduces Kamui's identity. With utter shock, Ranpo sets out a flare and instructs Atsushi to escape at all costs. Fukuchi cuts down Ranpo, who instantly retreats to Edgar Allan Poe's safe novel. Before fully transported, Ranpo reveals Kamui to be Fukuchi and warns him of the man's ability.
Atsushi questions Fukuchi's reasoning behind the terrorism despite being close with Fukuzawa, with which Fukuchi retorts that their paths have long diverged when Fukuzawa refused to fight with him during the war. As Atsushi prepares to face him, Fukuchi severs Atsushi's leg rapidly. Regeneration instantly begins, but Fukuchi threateningly wonders if it can still grow his head back if he decapitates him.
Ryunosuke Akutagawa intercepts the fight and makes his presence known upon Osamu Dazai's order with the rising of the smoke signal. Though visibly stressed to fight two of them, Fukuchi activates his ability and breaks the ship's handrail to use as his weapon. Fukuchi slices towards Akutagawa who evades his attack upon being told by Atsushi, which ends up cutting through the ship.
He launches another offensive at him, but Akutagawa stops the attack with Rashōmon: Demonic Jaws. As the mafioso approaches him, Fukuchi easily flips him over, similar to Fukuzawa's technique. Cornered upon a wall, Akutagawa craftily dodges his attacks until he runs out of possible moves, upon which a regenerated Atsushi saves him from Fukuchi. The two retreat inside the ship, much to Fukuchi's chagrin.
Anticipating their tactic of using the ship's emergency VIP submarine against him, Fukuchi awaits Atsushi and Akutagawa and smokes. As they arrive, Atsushi questions Fukuchi's actions after returning from the battlefield, with which Fukuchi admits having tortured countless people upon the government's orders during war. Realizing it as the only way to end all wars, Fukuchi reveals his motive of collapsing all nations.
Akutagawa and Atsushi charge at him with their activated abilities, though Fukuchi easily overwhelms them with his enhancing ability, using all possible materials as his weapons. Seeing their unfazed determination, Fukuchi tosses his Hunting Dog blade to summon Amenogozen and pierces through Akutagawa and Atsushi with the "space–time sword" that can cut through airspace to reach a target. As they collapse, Fukuchi berates their lack of trust in each other that contributes to their loss. Ultimately, Fukuchi invites Akutagawa to become his apprentice as part of the Hunting Dogs and asks him to kill Atsushi for him.
Akutagawa turns a serious gaze at Atsushi and asks him to fight him amidst Atsushi's protests. In the end, their conversation is a feint, and the two exchange positions. Akutagawa quickly envelops Atsushi with Rashо̄mon, and Atsushi claws at Fukuchi for their surprise attack, severing Fukuchi's arms that leads to his death. However, in truth, Amenogozen cuts through the past, which then allows Fukuchi to anticipate the surprise attack and severs Atsushi's right arm, vanishing their previous victory.
With their plans utterly crushed by their opponent, Akutagawa is asked by Fukuchi for his last words. Akutagawa firmly asserts that he simply needs not words but actions as long as he lives, immediately manifesting Rashо̄mon into his shirt and cutting beneath the ship to escape with Atsushi. However, Fukuchi cuts through the past again and averts their escape, ultimately landing a fatal blow at Akutagawa. Flashing a subtle smirk, Akutagawa bids Atsushi to escape as he cuts through the ship to have Atsushi flee through the submarine, before Akutagawa succumbs to his demise.
The guard (whom Akutagawa previously spared), along with others, arrives and encounters Fukuchi. The guards strike a conversation with him that eats away the time limit to cut through the past. Since they have also contacted coast guard for reinforcements, Fukuchi simply asks them to track down Atsushi. Fukuchi soon returns with a coffin containing Bram Stoker, the fifth member of the Decay of Angels. The so-called undead prince refuses to cooperate with him in turning Akutagawa into his kind, but Fukuchi threatens to finish him for good if he declines his command. Reluctantly, Bram bites Akutagawa and turns him into his kind through his infection-type ability.
Two weeks later, Tachihara reports the infection incident in the Mafia to his fellow Hunting Dogs. Though Teruko insults how idiotic he reacted, she believes Tachihara's story, as it coincides with recent disappearances of various mafiosi. Jōno conjectures it might be terrorism using an ability, which Tetchō thinks is the Agency's next terrorist act. However, Tachihara subtly implies that the Agency cannot possibly be terrorists after recalling how the detectives kept on mentioning being falsely accused numerous times.
They turn to their commander for his approval, but Fukuchi rejects it, claiming that Tachihara's ability is needed in addressing the infection case. Nevertheless, Tachihara opens his alternative plan using the flash drive he previously broke at the Sky Casino and sending it to Deputy Commissioner Yasui. Seeing as the flash drive might reveal the Decay of Angels' plan, Fukuchi plans to destroy it, so he asks for the flash drive to hand it to Yasui himself. Tachihara gives it to him and volunteers to tell Yasui of the coming evidence, much to Fukuchi's vexation.
At an abandoned location, Fukuchi wakes Bram and orders him to bite Yasui to end the possible conflict. As he leaves, he encounters Tachihara, who reveals that the flash drive he gave is a tracking device. He discloses being found out by the boss upon his return to the Mafia and learns of a mastermind behind the entire incident. With his mission of destroying Kamui, Tachihara faces Fukuchi, engaging him in battle.
Despite Fukuchi's skills and expertise, Tachihara gets the upper hand by controlling Fukuchi's supposedly all-powerful sword with his metal manipulation ability. In the ensuing battle, Tachihara rids Fukuchi of Amenogozen and has him shatter his sword to drive up all the metal shards inside the commander's body, who praises Tachihara for managing to give him a challenge in battle. As Fukuchi gets incapacitated, Tachihara notices an odd "T" carved on the wall. Before he can finish questioning Fukuchi's motives for betrayal, a sword suddenly stabs Tachihara from behind.
Fukuchi explains that he used Amenogozen to cut into the past in order to leave the "T" mark to notify his self of an impending emergency. Afterwards, Fukuchi has stabbed Amenogozen into the future, which then attacks Tachihara after luring him in front of the code mark. Fukuchi also blinds Tachihara to prevent him from further using his metal manipulation ability. Tachihara urges Fukuchi to kill him rather than have him, a mafioso, begging for life.
Fukuchi enlightens Tachihara on how angels – the highest rank of beings who surpass humans and rarely suffer during their long lives – suffer 16 times worse than torture in their death, hence calling it as the "decay of angels". He likens angels to the world's politicians, the "heavenly beings" whom others below them cannot ever reach. Before pulling Bram out of his coffin, Fukuchi calls himself the "decay of the angels" and considers the politicians worthy to die a painful death and be reborn.
As such, the Decay of Angels' penultimate step requires control over half of the world's nations, a feat which Bram estimates can be accomplished within four more days. Tachihara believes it cannot be possible, but he soon realizes and recalls that Fukuchi's ability can, after all, increase any weapon's efficiency by a hundredfold. As Fukuchi bids Tachihara to serve his commander again as a vampire, the mafioso slides out a blade and prepares to kill himself, but Fukuchi instantly stops him with his hands. Bram then bites Tachihara and turns him into his kind.
- (To Atsushi Nakajima and Ryunosuke Akutagawa) "Whatever road you two chose, I'm blessing you. Young men, walk the road that leaves no regret in your soul, and may whoever perishes, perish all the more in spirit."
- (To Ryunosuke Akutagawa about Atsushi Nakajima) "You didn't come here out of a moral wish to stop terrorism to begin with. In other words, you have no motive to kill me. That being the case, shouldn't evading death be your top priority? What's the matter? You don't want to kill him? Is his life that precious to you?"
- (Supposed final words) "Won't heaven… allow me to let go of my mission yet…?"
- (To Atsushi Nakajima and Ryunosuke Akutagawa about Amenogozen) "As long as I possess this sword that cuts through time, no matter of defeat will reach me, because, cutting through the past from the future, I can make that defeat something that never happened."
- (To Michizō Tachihara) "Now, who are the angels? […] Heavenly beings that others' hands cannot reach, namely… The politicians. Their indiscretion births war. They must die and be reborn in the cycle, and that death must be painful. That is why we've taken our blades. I am the decay of angels, the sign of death that falls on a nation's greed.