Dusk in Hosu City did not arrive with a quiet settling of light; it was cut short by the angular silhouettes of steel, glass, and multi-tiered pedestrian overpasses. Neon storefronts flickered to life in hues of electric cyan, magenta, and sterile white, reflecting off the polished pavement as commuters poured from train platforms into the avenues. On the surface, the city operated with the clockwork rhythm of any prosperous prefecture: automated delivery carts wheeled along dedicated lanes, large digital displays ran promotional reels of mid-tier agencies, and sidekicks in form-fitting synthetic costumes chatted casually near metro gates.
Beneath that commercial sheen, however, ran a subterranean pulse of pure tension.
Patrol officers kept their hands anchored closer to their utility belts than regulation required. Veteran pros glanced into narrow cross-streets before crossing them, their eyes lingering on blind corners, shadowed alleys, and fire escape ladders that rose into the dark between office towers. The name had not yet been shouted through public emergency broadcasts, but it moved like stagnant water through every precinct in the district: the Hero Killer.
Ikaris walked the perimeter of the downtown core with hands resting loosely in the pockets of his dark coat. He had discarded the salt-worn poncho near the mountain foothills outside Deika, trading it for simple, unbranded attire that blended into the dense evening crowd. His boots struck the sidewalk with steady, metered footsteps, carrying no discernible aura or physical weight beyond that of a tall, quiet man passing through on his own business.
Yet his internal senses refined over millennia spent tracking celestial divergence across raw, unformed worlds were mapping the district in staggering detail.
He felt the distinct frequency of thousands of individual Quirk factors: the minor thermal fluctuations of a shopkeeper warming tea with his fingertips, the electrostatic crackle of a courier moving with enhanced speed, the dull hum of bio-magnetic pulses radiating from underground transit lines. But cutting through that mundane biological static was a singular, discordant note.
It was not the cold administrative precision of the Commission's snipers, nor the desperate, hollow ache he had felt in the Kamino slums.
It was sharp. Heavy. An old, bitter iron smell that smelled like a slaughterhouse hidden behind an altar.
Ikaris altered his path without breaking stride, turning away from the brightly lit central promenade toward the older, concrete canyons that formed the spine of Hosu's warehouse district.
In the narrow corridor between two nine-story commercial buildings, the evening light had already died completely. Rain from an earlier shower dripped rhythmically from a rusted drainage pipe, tapping against the lid of a dumpster like an impatient clock.
A man was crawling across the wet asphalt.
His costume was brilliant vermilion and gold, designed with sweeping aerodynamic fins along the forearms and calves—the kind of suit tailored for high-speed chases, billboard endorsements, and high-definition aerial cameras. Across his chest ran the embossed crest of a regional agency, sponsored by an athletic brand whose advertisements were currently running on three different screens half a mile away.
The costume was torn open at the shoulder. Blood, dark and thick, seeped through the synthetic fabric, pooling in the shallow grooves of the pavement.
"P-please..." the hero gasped. His fingers clawed at the wet gravel, dragging his torso forward an inch at a time. The rest of his body was entirely unresponsive, heavy as wet clay. "Take... take my credentials. The account code... there's three million yen in the agency reserve—"
"Quiet."
The voice dropped from above like an executioner's axe.
From the rusted fire escape six meters up, a figure descended. He did not leap with the theatrical grace of an acrobatic pro; he dropped like a sack of lead, his bandaged boots landing on the asphalt without a breath of wasted momentum.
Chizome Akaguro straightened his spine. He wore blood-stained rags, heavy tactical combat boots, and a ragged mask that left only his red-rimmed, lidless eyes exposed to the dim sodium wash filtering from the alley entrance. Strapped across his torso were knives of varying lengths, pitted and notched from repeated use. In his right hand, gripped with knuckles scarred white from years of white-hot tension, was a long, serrated katana.
The Hero Killer stepped forward, his boots tracking crimson water across the asphalt. He reached down with his free hand, took the blade of a throwing knife between his calloused fingers, and brought the thin smear of fresh blood to his tongue.
The crawling hero instantly seized. His jaw clamped shut, a strangled sound catching in his throat as the last residual motor function in his neck died under the crushing grip of Bloodcurdle.
"You speak of currency while your blood drains into the gutter," Stain said, his voice a low, gravelly rasp that sounded as if it had been dragged through broken glass. He leveled the tip of the katana at the center of the hero's throat. "You wear the title of 'Hero' like a cheap suit bought for a parade. You calculate your rank on the leaderboard before you calculate the lives in the building. You smile for lenses, but when the shadows lengthen, your hand opens for coins."
The fallen hero's eyes bulged with pure, animal terror, tears cutting through the grime on his cheeks.
"A society drowned in false idols must be purified," Stain hissed, his posture coiling like a spring, muscles knotting along his shoulders as he raised the sword for the downward thrust. "The title must be washed in blood until only the true remain. Until All Might alone—"
"You use many words to describe your own exhaustion."
The voice came from the mouth of the alley.
Stain's strike froze an inch above the exposed jugular. His instincts, honed in the gutters and backrooms of an uncompromising underground crusade, flared with a violent, instantaneous alarm.
He had not heard a footstep. He had not heard the brush of cloth against the brick walls. He had not felt the ambient draft shift.
Stain did not turn his head immediately. He pivoted on his back foot, using the swing of his body to bring the katana around in a defensive arc, sweeping the shadows with his red-rimmed, manic gaze.
Standing beneath the dull amber glow of the solitary wall-mounted lamp was Ikaris.
He stood with his weight evenly distributed, hands buried inside his coat pockets. The light hit his square jaw and dark hair, leaving his eyes in deep, shadowed relief. There was no costume, no weapon, no emblem of a registered agency or an underground syndicate.
The paralyzed hero on the ground let out a muffled, desperate whimper, his eyes darting toward Ikaris like a drowning man catching a glimpse of a rescue rope. "H-help... pro... he's... he's the—"
Stain ignored the man on the ground entirely. Every nerve ending in his body was screaming a warning that his intellect could not categorize.
When he looked at licensed heroes, he saw vanity, rot, and the fragile cowardice of men hiding behind government contracts. When he looked at common criminals, he saw rabid dogs fighting over scraps in an alley.
When he looked at the man standing before him, he saw... nothing.
No heartbeat audible through the damp air. No ragged breath. No tension in the tendons of his neck. The man stood with the terrifying, motionless density of a tectonic plate that had simply chosen to take the shape of a person.
"Another one," Stain snarled, the tip of his serrated blade dipping slightly to point at Ikaris' sternum. "Did the agency dispatch a reserve unit? Or are you a bystander whose pride has outstripped his sense of survival?"
"Neither," Ikaris said calmly. His voice did not echo off the brick; it filled the space, steady and neutral, pressing against the eardrums like deep water. "I was walking through the district. I felt the concentration of your intent. It is remarkably loud."
Stain's lip curled back, exposing yellowed, uneven teeth behind the ragged wrap. "Intent? You call the divine duty of cleansing 'intent'?"
He stepped over the paralyzed hero, his boots splashing into the red puddle. "Look at him! Look at this creature lying in his own filth! He calls himself a guardian of the public! He takes a salary from the tax coffers while innocent people are crushed by villains he is too lazy to pursue! He is an infection! And this whole city is rotting from the same disease!"
Ikaris' gaze dropped to the bleeding man on the ground. He looked at the torn suit, the expensive gauntlets, and the terrified, weeping eyes of a person who had spent his life believing the system would always place a safety net beneath him.
Then Ikaris looked back at Stain.
"He is weak," Ikaris said, his tone devoid of mockery. "He is vain. He has mistaken comfort for purpose. I have seen millions like him across ten thousand cities."
Stain's eyes narrowed, a flicker of savage approval crossing his scarred face before vanishing back into suspicion. "Then you see it! You understand the rot!"
"I see a man who chose an easy path," Ikaris replied. "And before him, I see another man who has chosen an even easier one."
The silence in the alley snapped taut.
Stain's grip on the hilt of his katana tightened until the leather wrap creaked. "What did you say?"
"You call this purification," Ikaris continued, taking a single, unhurried step into the alley. His hands remained in his pockets. "You tell yourself that by driving a piece of sharpened steel through the throats of selfish men, you are waking the world. You speak of your 'ideal'—of a single symbol you deem worthy—because the reality of humanity is too wide, too messy, and too disappointing for you to endure."
"Shut your mouth," Stain growled, his voice dropping into a register of pure, lethal vibration. The air around him seemed to chill as his bloodlust rolled outward like an invisible wave of poison.
"Murdering the imperfect is not conviction," Ikaris said, meeting that suffocating pressure with an absolute, unmoving calm. "It is the petulance of a child who breaks his toys because they do not match the picture in his head. You butcher men in dark corners because building something that endures requires patience you do not possess. It is very easy to destroy a flawed man. Any stone falling from a cliff can do that. It takes strength to make him better."
"You know nothing of strength!" Stain roared.
The pavement beneath his boots fractured. Stain moved with a speed that erased the space between them in an eye-blink, his body executing a sequence drilled through a thousand private slaughterhouses.
With his left hand, he snapped two barbed throwing knives toward Ikaris' eyes—a blinding strike intended to force a defensive dodge or trigger an evasive Quirk activation. In the same fluid motion, his hips twisted, driving the heavy serrated katana in a horizontal sweep aimed to sever the tendons in Ikaris' lead leg and draw the droplet of blood that would seal the paralysis.
The knives struck first.
They did not pierce. They did not scratch.
The hardened steel tips hit the thin air an inch before Ikaris' face and rebounded with a dry, metallic ping, their forged points blunted into flat lead slugs before tumbling harmlessly into the wet rubbish.
Stain's katana completed its arc.
With the full, leveraged momentum of his torso and the weight of a blade tempered in blood, the serrated edge slammed directly into Ikaris' left forearm.
There was no sound of flesh parting. There was no spray of arterial crimson.
There was a deafening, crystalline crack—the sound of an iron bell shattering against granite.
The tempered steel of the katana blew apart into seven jagged fragments. The shockwave of the kinetic rebound tore through the hilt, wrenching the leather wrap from Stain's palm, splitting the skin between his thumb and forefinger, and driving the shock back up his radius with enough violence to crack his wrist.
Stain stumbled backward, his boots skidding across the slick stone, his breath catching in a dry, ragged gasp.
He stared at his right hand. The hilt was bent, the stub of the blade sheared off at the crossguard, vibrating with a high-pitched hum of ruined tension.
Ikaris had not flinched. He had not shifted his stance by a single degree. The sleeve of his coat was cut, revealing the smooth, golden-toned skin beneath.
There was not a scratch. Not a bruise. Not even an indentation where forty pounds of sharpened steel had struck at maximum velocity.
"Your weapon is broken," Ikaris said softly.
He reached out his right hand, plucked one of the spinning steel shards out of the air before it hit the ground, and held it between his forefinger and thumb. With a casual, effortless squeeze, the hardened, carbon-forged metal folded like wet cardboard, compressing into a tight, dense pellet of inert scrap.
He opened his hand and let it drop onto the asphalt.
Stain's chest rose and fell in violent, uneven heaves. For the first time since he had taken up the name of the Hero Killer, the absolute, unshakable certainty in his mind cracked open. His Quirk, his blades, his speed, his terrifying presence—the things that had brought dozens of seasoned professionals to their knees in pools of their own blood—meant nothing here.
The man before him did not have an "Armor Quirk." There was no biological shift, no hardening of cells, no energy barrier flaring to life to deflect the blow.
He was simply... unbreakable.
"What... are you?" Stain rasped, his left hand dropping to the hilt of a combat knife at his waist, though his fingers trembled with involuntary shock. "A monster? A secret weapon of the Commission? Who gave you that body?!"
"No one gave it to me," Ikaris replied. He walked forward until he stood directly over the paralyzed hero, who was staring up at him with wide, disbelieving eyes. "And no one in this city has the power to take it away."
Ikaris looked down at the bleeding pro. He knelt on one knee, his coat brushing the wet ground. He reached out with two fingers, touching the deep, ragged laceration on the hero's shoulder.
A microscopic warmth—a clean, golden radiance that smelled of dry ozone and starlight—bloomed beneath his touch.
The severed muscle fibers reconnected. The torn capillaries sealed themselves. The skin knitted together smoothly, leaving behind only clean, pale tissue where an arterial wound had been draining the man's life seconds before. The hero let out a long, trembling gasp as the paralyzing toxin in his bloodstream was incinerated by the gentle, all-consuming heat of an energy that operated outside the laws of biological quirks.
Ikaris stood up, his gaze returning to Stain.
"You believe that fear will teach them," Ikaris said, his voice dropping into a quiet, irrevocable condemnation. "You believe that by showing them death, they will remember what it means to live. But fear only breeds smaller men. It breeds men who follow the loudest voice because they are terrified of the dark."
He took another step toward the alley mouth, his boots stepping past the scattered shards of the broken katana.
"You are not a cleanser, Chizome Akaguro," Ikaris said, using the man's birth name with an indifference that felt more devastating than a punch. "You are just another casualty of this world's vanity. You have spent so long staring at the sun that you think everyone who cannot bear the light deserves to be blinded."
Stain's hand remained on his knife, but his arm did not rise. The blood dripping from his split palm mingled with the rainwater on the asphalt, cold and useless. His eyes, burning with a feverish, desperate rage, tracked Ikaris as the immortal reached the mouth of the alley.
"You walk away?!" Stain snarled, his voice cracking with fury. "You have that power... that absolute, unyielding strength... and you walk among the sheep like a ghost?! If you won't bleed for a side, you are worse than they are! You are an empty vessel!"
Ikaris paused at the boundary where the alley's shadow met the bright, neon-lit avenue.
He did not look back over his shoulder.
"I have fought wars that lasted longer than the memory of your entire species," Ikaris said, his words drifting back through the damp corridor like an ancient decree. "I have watched worlds burn because men like you decided that their anger was the voice of god. Keep your knives, boy. You will find that when the true dark arrives, your blood will buy you nothing."
He stepped out into the light.
The pedestrian crowd on the avenue parted naturally around him, not because they recognized him, but because the space he occupied carried a subtle, unspoken authority that their mortal instincts obeyed without comprehension. Within seconds, his dark coat and steady silhouette were swallowed by the flowing river of commuters, leaving the alley behind.
Inside the corridor, the silence was absolute, broken only by the wail of approaching sirens three blocks away.
The pro hero on the ground sat up, coughing, clutching his fully healed shoulder with trembling hands. He looked at the shattered steel littering the pavement, then at the Hero Killer, who remained frozen beneath the dim sodium lamp, staring at the empty sidewalk where the stranger had vanished.
Stain looked down at his ruined hilt.
For the first time in his life, the taste of blood in his mouth did not bring clarity.
It tasted only of ash.
Two miles away, high above the commercial core of Hosu, the air atop an industrial water reservoir began to fold inward.
A thick, oily purple mist gathered in the cold wind, twisting space into a silent, localized vortex. From the dark heart of the distortion, two figures emerged onto the metal catwalk.
Tomura Shigaraki stood near the railing, his red eyes darting hungrily across the glittering city below. The pale, severed hand clamped across his face cast long, skeletal shadows across his dry, cracked throat. Behind him, Kurogiri's yellow eyes flickered calmly within the swirling expanse of his misty silhouette.
"It looks so clean from up here," Shigaraki muttered, scratching at his collarbone until the skin flaked red. "All these happy people walking around under the big bright signs. It makes me want to throw up."
"The diversion is prepared, Tomura Shigaraki," Kurogiri said smoothly. "The beasts are in transit."
Shigaraki chuckled a dry, rattling sound that was lost to the wind.
"Let's see how much they love their 'Heroes' when the sky starts falling," he whispered, raising his hand toward the downtown lights. "Let's see if their symbols can hold up the ceiling."
Behind them, three massive, dark shapes shifted in the shadows of the portal—skin like blackened coal, brains exposed to the night air, and dead, unblinking eyes waiting for the signal to tear the world apart.