Chapter Text
Being the only female Hashira was often a quiet kind of difficult.
It wasn't the overt cruelty that wore her down—no one raised their voice or struck her. It was something far more insidious: the weight of what remained unspoken, the silent language of eyes that slid away too quickly, of mouths that pressed into thin lines whenever she entered a room.
Eyes.
You're showing too much skin.
Mouth.
You talk too much.
Eyes again.
You're simply too much.
Mitsuri had memorized these translations years ago.
She knew what they thought.
They didn't need to speak it aloud.
Someone like Mitsuri—who laughed too freely, who loved too openly, who had become a Hashira not from hatred but from a desperate, aching desire to be loved and accepted—could never truly last in the Demon Slayer Corps.
The path of the sword demanded obsession, demanded the kind of all-consuming darkness that had forged the others into weapons.
She was too soft. Too bright. Too much.
Even those who said nothing at all carried that same unspoken belief in the careful neutrality of their expressions: Mitsuri Kanroji would either break or die.
It was only a matter of when.
Long ago, before her time, there had been two other women who had worn the title of Hashira.
Mitsuri had never met them, never seen the way they moved or hear the timbre of their voices. But whenever their names were spoken—in passing, in history, in the reverent whispers of older slayers—the tone shifted.
It deepened with respect, with awe, with the particular gravity reserved for legends.
Mitsuri both envied and admired them from afar.
They had been worthy. They had been enough.
Why couldn't she be?
____________
The cruelest part, the part that would echo in her mind for years to come, was that they had all been right.
Every doubt, every silent judgment, every unspoken prediction crystallized into truth in a single, searing moment.
The mission had been routine.
A demon in the forests near the mountains—nothing unusual, nothing that should have threatened a Hashira.
Mitsuri had danced through the fight with her usual grace, her blade singing through the air, her unique musculature allowing her to twist and strike in ways that should have been impossible.
She had won.
She had killed the demon.
And then, walking through the undergrowth back toward the path, she had felt it: a sharp, sudden prick against her ankle.
Instinctively, she looked down.
A small cut, barely a scratch, welled with a single bead of blood against her skin.
Then the color began to change.
Purple spread through the wound like ink blooming in water, a sickly, venomous hue that crept outward in tendrils.
The pain followed an instant later—not the dull ache of an ordinary injury, but something searing, something that felt like fire racing through her veins, like her blood was being replaced with molten lead.
Mitsuri's legs crumpled beneath her.
She hit the forest floor hard, the cool earth doing nothing to soothe the inferno consuming her from within. Her hands clutched at her ankle as if she could physically squeeze the poison out, as if her famous strength could overcome this invisible enemy.
But there was nothing to fight. No demon to strike, no enemy to face. Only herself, only her own foolishness, only the tears that began to stream down her cheeks as the pain overwhelmed her.
Foolish. Careless. Weak.
The thoughts came unbidden, a chorus of accusations that sounded exactly like the voices of her comrades.
Someone else would have noticed.
Even fourteen-year-old Tokito, with his prodigious talent and otherworldly awareness, would never have been caught so carelessly.
But she was not them.
She was only Mitsuri—too much, and never enough.
The sickly purple climbed higher.
From ankle to calf, from calf to thigh, the dark tendrils spread like roots seeking purchase in fertile soil.
When they reached her stomach, the weight became unbearable—kilograms of lead settling into every limb, every organ, every thought.
Her strength deserted her completely.
Mitsuri felt herself sinking, her body pressing deeper into the unfeeling earth as if the forest itself was eager to claim her.
The canopy above swayed gently in a breeze she could no longer feel, leaves rustling with the indifferent music of a world that would continue spinning without her.
And though she knew it was foolish—profoundly, pathetically naive—the scent of those poisonous plants struck her as strangely beautiful.
There was a majesty to them, an elegance in the way they killed.
For a few fleeting seconds, the pain almost felt pleasant, a dizzying warmth that promised oblivion before sharpening back into pure, unadulterated agony.
"Ah..." The sound escaped her like a prayer, like a confession. Her eyes searched the canopy above, looking for answers that weren't there. "I-I suppose... they were right... weak... so weak."
Her voice, usually so bright and bubbling, had withered to barely a whisper.
Every part of her was breaking down, dissolving, approaching the threshold beyond which there was no return.
"Weak?" The voice came from nowhere and everywhere, cool as night air in high summer, melodious as a song she had never heard but somehow recognized. "This poison should have killed you instantly. It is astonishing that you are still conscious, my dear."
Mitsuri needed to see. If these were to be her final moments, she needed to know the face that belonged to such a captivating voice. She turned her head, the motion costing her more effort than entire battles ever had.
"N-no... It's... poiso..."
The words wouldn't form properly.
The venomous marks had climbed her neck, were spreading across her face. Saliva pooled uselessly in her mouth, her tongue growing thick and uncooperative.
"I am listening." The voice had moved closer now, close enough that Mitsuri could feel the faint stir of air as its owner knelt beside her. "You may speak freely."
"I... c-can't..."
It was the last shred of strength she could muster.
But even as she spoke, even as she felt herself fading, something strange was happening within her.
The roots she could feel shifting inside her veins—they no longer felt like decay.
They felt like... blooming.
A delicate hand, pale as moonlight, reached out to caress one of the stems that had sprouted from her skin.
The touch was impossibly gentle.
If this was death, at least it was beautiful.
"Oh! I understand." The voice brightened with recognition. "Allow me to help with that. I simply couldn't permit someone as beautiful as you to die before my eyes."
Mitsuri's eyes fluttered half-open.
A silhouette leaned close to her face—close enough that she could distinguish colors now. Purple plants surrounded them. A purple kimono draped the figure before her.
Purple is a lovely color, Mitsuri thought dimly. The words alone seemed to keep her alive a moment longer.
Or perhaps it was simply the sound of that unknown girl's voice.
Then came warmth.
Her body, so cold just moments ago, began to grow warm.
No—not her body. Her mouth.
Soft lips pressed against hers. Small hands cradled her face with infinite tenderness.
With a sudden, sharp gasp, Mitsuri drew breath again.
"Ah! G-gah—"
Her eyes flew open fully.
The moon still hung in the sky above.
The forest still surrounded them.
The flowers still bloomed.
And before her knelt the most beautiful creature she had ever seen.
"Take your time, my dear." The girl's voice was gentle, almost amused. "This poison can leave quite the aftermath."
Purple.
She was purple—her kimono, the flowers in her hair, the visible eye that gazed at Mitsuri with an expression of genuine fascination.
The other eye was partly obscured by a pale blossom, adding to her ethereal beauty.
And the small, crucial detail that Mitsuri's training screamed at her to notice: she was a demon.
Her limbs still refused to obey—the aftermath of the poison, or perhaps simply the shock of what had just occurred.
So Mitsuri did what she did best: she spoke.
"Why?" The word came out rough, bewildered. "Why did you save me?"
The demon girl knelt gracefully at her side.
With delicate, knowing hands, she began to pluck the flowers that had bloomed across Mitsuri's body—the physical manifestations of the poison she had somehow neutralized.
Each pluck sent a small shiver through Mitsuri's recovering frame.
Her visible eye was purple too, a shade so deep and rich that Mitsuri found herself falling into it. She didn't understand what was happening, didn't understand why a demon would save a Hashira.
But in that moment, the color purple seemed to become her favorite.
"You are beautiful." The demon stated it simply, as if it were an objective fact, like the moon being in the sky or the forest being full of trees. "I could see it, and I felt it in your very being as my venom flowed through you. The real question is, why would I not save you?"
There were many things Mitsuri didn't understand.
She didn't understand hatred—not really, not the all-consuming kind that drove her comrades.
She didn't understand lies, though she had been on the receiving end of enough of them.
She didn't understand love, despite having searched for it so desperately her entire life.
So why did she find herself believing this demon's words?
"You are a demon," she stated. It wasn't an accusation—merely an observation, a fact that sat strangely alongside the warmth still lingering on her lips.
"And you are a Demon Slayer, are you not?" The demon's head tilted slightly, a gesture of genuine curiosity. "A Hashira, to be exact. So why do you not attack me?"
The question hung in the air between them.
Mitsuri could feel her strength slowly returning, could feel the familiar power beginning to thrum in her muscles again.
She could reach for her sword. She should reach for her sword.
"Why... don't you attack me?"
A smile curved the demon's lips—not cruel, not hungry, but genuinely pleased. "I do not attack women. They are too beautiful to devour, and too timid to truly worship. I hope you can understand that."
Mitsuri couldn't understand it.
Or perhaps she simply chose to say nothing, afraid that speaking might shatter whatever strange spell had fallen over this moment.
"And now." The demon's voice shifted, becoming more practical, more considering. "What will you do?"
Mitsuri's voice emerged more weary than afraid.
If any of her comrades could see her now—lying on the forest floor, conversing peacefully with a demon who had just kissed her—their scorn would be limitless.
Their silent judgments would finally have words to attach to them.
But Mitsuri was so tired.
Tired of her comrades' unspoken disapproval.
Tired of her ex-fiancé's rejection.
Tired of her mother's impossibly high expectations, of never being quite enough for anyone.
"What can I do with you?" she echoed, the question more honest than she intended.
The demon girl sighed elegantly, crossing one leg over the other and resting her chin on her hand. Her posture held no judgment, no expectation. Her eyes simply waited.
Mitsuri took a deep breath.
"Save me."
The words tumbled out before she could stop them, before she could consider how pathetic they sounded, before she could remember that she was begging for help from a demon.
Was that asking for too much? Would she even agree?
"Of course I can!" The response came immediately, bright and genuine. Then the demon's expression grew more serious, more calculating. "But there are... complications. Significant ones, especially knowing you are a Hashira."
The exhaustion was pulling at Mitsuri again, heavy and warm.
But this time it felt natural—the fatigue of a body recovering, not the cold lethargy of approaching death.
"I need to know your name, my dear."
Asked in such a way, with such gentle insistence, Mitsuri found she couldn't refuse.
"Mitsuri. Mitsuri Kanroji."
"Mitsuri..." The demon savored the name as it left her lips, drawing it out like honey.
A wide, genuine smile spread across her beautiful face—so lovely that Mitsuri felt her heart stutter.
"My name is Shinobu." She paused, considering. "I could leave you here and let someone else take care of you—don't worry, I wouldn't let anyone harm you. Or..." Her visible eye glittered with something Mitsuri couldn't name. "I could take care of you myself. But for that, you would have to be mine. I know many girls wouldn't agree to such terms, which is why I always make a point to ask."
She leaned closer, close enough that Mitsuri could smell wisteria and something uniquely her.
"What do you say, my dear?"
What would a sane person do in this situation?
Try to escape? Fight the demon? Destroy the demon!
But Mitsuri had never been very good at being sane. She was too much, after all—too emotional, too affectionate, too hungry for love.
And Shinobu was looking at her like she was precious. Like she was enough.
"Yes," Mitsuri whispered. "I'll be yours."
__________
Two months passed.
Mitsuri returned to the Hashira meeting the following week as if nothing had happened—as if she hadn't just spent nearly being healed and kissed by a demon, as if her lips hadn't learned the shape of another woman's, as if her heart hadn't begun to belong to a creature she was sworn to destroy.
"This meeting is concluded, my children." The Master's voice was gentle, carrying as always. "I look forward to hearing the results of your missions with great expectation."
The Master was far more agreeable than anyone else in this room. Mitsuri respected him deeply—loved him, even, for his kindness, for seeing value in her when no one else did.
Her comrades began to disperse, as always.
Shinazugawa shot her a glance that could curdle milk before stalking away. Even Iguro, who she had thought might be friendly, simply nodded curtly and departed.
It occurred to Mitsuri that she didn't know where any of them lived. Except Kyojuro—but visiting him meant enduring his father's temper, which was hardly a pleasant way to spend an afternoon.
She had no desire to return to her own mansion either.
The place was so vast, so empty, so lonely. Every room echoed with silence, every corridor stretched endlessly without purpose.
She could always ignore the Master's implicit suggestion and set out on her next mission immediately.
But traveling with Shinazugawa when he was in one of his moods—which was always—seemed like its own special form of torment.
___________
When you returned from a mission in the Demon Slayer Corps, there was no designated place to go for healing.
No hospital, no infirmary, no system of care. Every slayer was responsible for treating their own wounds.
Some were more skilled at it than others.
Unfortunately, medical knowledge had never been Mitsuri's strength.
Asking any of her comrades for help was impossible—a definitive, absolute no. She could already imagine their expressions, could already hear the unspoken judgments crystallizing into words.
Kyojuro was on a mission—her first choice, though even his boundless enthusiasm would have been difficult to face with this particular ache in her chest. Tokito didn't know much about healing either—her second choice, though his perpetual detachment would have offered no comfort.
But Mitsuri truly couldn't stand the throbbing pain in her head after that hard slam against the ground.
Everything would have been easier if that demon had just struck her muscles instead of slamming her skull into concrete!
Her unusual strength usually saved her from unforeseen circumstances—her body was a weapon, dense and powerful.
But this time, Shinazugawa was indirectly at fault. He should have covered her back, just as she had done for him mere seconds ago.
He should have been there.
Mitsuri thought it was profoundly unfair.
Perhaps if she slept, the pain would be gone by morning.
She lay back on her bed, feeling the night air from the open window wash over her face. Cool and gentle, carrying the faint scent of distant flowers.
The window...
The window shouldn't be open.
Mitsuri sat up abruptly.
No one was there. The darkness was empty, exactly as it should be in this place.
So why did she feel this sharp pang of disappointment?
Sleep became utterly impossible. Every time she closed her eyes, she saw purple. Purple flowers, purple eyes, purple kimono. But no kiss followed the vision. No gentle words. No whispered, "Let me take care of you."
She missed Shinobu.
She missed a demon.
It wasn't just Shinobu she missed—it was her hands, her voice, her kisses. It was the way she looked at Mitsuri like she was the most precious thing in existence. It was the warmth of her embrace, the safety of her arms.
And it was wrong.
Everything about it was wrong.
Just hours ago, she had been battling demons—the very same species as the woman she loved. Her blade had been stained with their blood, her body still ached from the fight.
She was supposed to hate them. She was supposed to hate Shinobu.
But Shinobu had never given her a reason to hate. Only kindness. Only acceptance. Only love.
Did Shinobu love her in return? Mitsuri didn't know.
She didn't know much about love at all—only that she had searched for it her whole life, and that she had finally found something that felt like it might be the real thing.
Without another thought, Mitsuri rose from her bed.
___________
The journey took about thirty minutes.
Mitsuri knew the way by heart now—which flowers to avoid, which stony path was safe, which seemingly solid ground would give way to deadly traps. Shinobu had been clear about that, her voice blending warning and possessiveness in equal measure: she had no patience for visitors, no tolerance for other humans trespassing in her domain.
Mitsuri was the sole exception.
A privilege that felt both thrilling and terrifying.
It was then, as the silhouette of Shinobu's dwelling materialized through the trees, that Mitsuri realized she had grievously underestimated her headache.
What had been a throbbing discomfort now swelled into something nauseating, blinding.
The world tilted on its axis, trees swaying when they shouldn't, the ground rising up to meet her in waves.
The door—her sanctuary—was mere steps away. A promise of safety so close it was agonizing.
This is no time to faint, she thought desperately.
But her body betrayed her.
A vortex of shimmering purple bloomed at the edges of her vision, swallowing the world whole before everything dissolved into absolute, unforgiving black.
___________
"Welcome back, little butterfly."
The voice was silk, pulling her back from the abyss.
Mitsuri's eyelids fluttered open. Her emerald green eyes, clouded with confusion and residual pain, found and focused on the mesmerizing amethyst gaze hovering above her.
Green met purple once again, and the world snapped back into place.
"Shinobu..."
The name was a sigh of pure relief.
The familiar warmth of Shinobu's presence enveloped her, seeping into her aching bones, her throbbing head, her bruised heart.
"Are you feeling better?" Shinobu's voice was deceptively light, but her hands were firm and professional, gently pressing on Mitsuri's shoulders to keep her from rising. "Don't move too much; you have a concussion. You had some rather nasty cuts on your back that I took the liberty of cleaning and bandaging."
Her expression softened, but her eyes sharpened with a dangerous glint.
"You're so battered, my dear... who was responsible for this?"
Mitsuri's mind, still foggy, turned inward.
The memory of the battle was a blur—movement and impact, the demon's final strike, the ground rushing up to meet her.
The answer was clear. It brought a wave of shame.
"It was me," she confessed, her voice small. "I was too careless. I lost my footing and ended up hitting my head hard against the ground."
She reached out, her fingers weakly clutching at Shinobu's sleeve. Her composure crumbled.
"Shinobu... I missed you terribly."
In an instant, Shinobu gathered her firmly into her arms.
Her movements were impossibly delicate, her lips pressing warmly against Mitsuri's forehead.
Her embrace was almost possessive—as if she wanted to hide Mitsuri from the world, as if she wanted to kiss her that very instant and then hunt down whoever had been so reckless as to damage what was hers.
"Are they treating you well?" Shinobu's voice shifted—still sweet, but now edged with something sharp and deadly. "Tell me. Right now."
She pulled back abruptly, her delicate hands framing Mitsuri's face with an intensity that bordered on violence.
Mitsuri could feel the subtle pressure of those slender fingers against her jaw and neck—a touch that could be a caress or a chokehold.
Shinobu's amethyst eyes, usually sparkling with mischievous affection, now burned with a cold, possessive fire.
"It's... it's not so bad, really." Mitsuri stammered, the words feeling inadequate even as she spoke them. "I just have to ignore them. Shinobu, you promised me you wouldn't get involved. You gave me your word!"
"My word?" A humorless, melodic laugh escaped Shinobu's lips.
"I won't lay a finger on them myself. But I could whisper the coordinates of their precious Hashira meetings right into Muzan's ear. How would that be? Or perhaps, provide him with a detailed map of each of their estates and suggest he send an Upper Moon for a... thorough cleansing."
She leaned closer, her voice dropping to a venomous whisper.
"I would do it. I would burn their entire world to the ground if it meant securing your happiness. Now, tell me what you want, Mitsuri."
A cold dread, sharper than any demon's claw, pierced Mitsuri's heart.
No.
She couldn't have that. The weight of their blood would drown her forever. Every face, every life, every soul destroyed because of her—she would never survive it.
Desperate to redirect the storm, Mitsuri brought her own hands up, cradling Shinobu's face with a tenderness meant to disarm. Her thumbs stroked the soft skin of her cheeks.
"Why waste a single thought on them?" Mitsuri whispered, her voice a deliberate, soothing balm. "Forget they exist. I am right here, completely yours. Use me. Kiss me until I can't remember my own name. Mark me so everyone knows who I belong to."
She held Shinobu's gaze, pouring everything she had into her next words.
"Why are your thoughts on them and not on me? Are they more important than I am? Answer me, Shinobu."
Mitsuri knew this dance intimately now. She knew the precise words, the exact tone to shift Shinobu's obsessive focus from destructive wrath to consuming passion.
This was the balance she had to maintain—the careful art of being everything, so that Shinobu would want nothing else.
Shinobu's gaze, her every waking thought, had to be fixed on her. Her lips should always be busy tracing patterns on Mitsuri's skin, a constant physical claim.
The unspoken question echoed in the silence of her own mind: Why can't that be enough? Why can't that be love?
"Nothing is more important than you." The anger in Shinobu's voice dissolved into something darker, more absolute. Her voice dropped to a hypnotic, fervent whisper.
"Nothing and no one. If Lord Muzan himself were to materialize in that very corner, my only thought would be the most efficient way to discard him so I could have you all to myself again. Do you understand now? You are the only thing that is real."
What Mitsuri was doing was a sin.
A betrayal of her oath, her comrades, everything she had sworn to protect. A poison seeping into her soul.
And yet, it felt so intoxicatingly good.
The warmth of Shinobu's embrace was an addiction she had no desire to cure.
"Tell me you love me." The plea tumbled from her lips, raw and vulnerable.
She needed to hear the words, needed them to anchor her in this turbulent sea of forbidden affections.
"I love you." The declaration was immediate, fervent—a vow and a shackle in one. "You are mine, and the thought of any other claiming even a fragment of your attention is unbearable. Those fools who are blind to your worth will pay for their ignorance. But don't trouble yourself, my dear. I need not dirty my own hands."
Shinobu's voice grew softer, more intimate.
"As long as I continue to supply Muzan with his precious antidotes, his favor—and his restraint—are assured. Nothing will ever stand between us. Not the Corps, not the other demons... not even if the Blood Lord himself turned his blade on me. Do you understand the depths I would plunge to? I would let the entire world crumble to ash, my own existence included, before I let you be taken from me."
Mitsuri's smile, a fragile thing, shattered and died on her lips.
"A world... without you in it?"
The very concept was a void.
A chilling emptiness her mind could not—would not—fathom.
"Love makes monsters and martyrs of us all."
Shinobu's voice was a hypnotic caress as she traced the line of Mitsuri's jaw. "Consider yourself fortunate to be the object of mine. I cherish what is mine. I protect it, I adore it. Your happiness is my singular purpose. So much so, that even if you were the one to lead your fellow Hashira to my doorstep, even if you held the blade that severed my head from my shoulders, my final thought would be of you. My spirit would linger, and I would still find a way to watch over you."
Why was she saying these terrifying, illogical things?
A hot surge of denial rose in Mitsuri's throat. She could never betray Shinobu—not now, not ever.
Even if this bond unraveled her life as a Hashira thread by thread.
Even with the haunting knowledge that lurked in the back of her mind.
The strangled cries.
The ghastly silences.
The sounds that sometimes emanated from the depths of Shinobu's forest home—the fate of the men she lured and devoured.
Their phantom screams still echoed in the quiet moments, a grim chorus that was the price of this love.
A sound Mitsuri feared was now permanently etched into the fabric of her soul.
The moment Shinobu released her from the embrace, Mitsuri's senses were abruptly flooded with the grim reality of her surroundings.
Blood.
So much blood.
It painted the floors and walls in a macabre tapestry—splashes and smears, patterns that might have been beautiful if they weren't so horrifying.
Partially consumed limbs lay discarded like grotesque trophies, arranged with an almost artistic sensibility that made it somehow worse.
Instinctively, Mitsuri threw herself back into Shinobu's arms, burying her face in the demon's neck.
If she focused solely on this—on the familiar scent of wisteria and something uniquely Shinobu—she could almost ignore the copper tang hanging thick in the air. She could almost block out the sight of bloody handprints smeared across the nearby wall.
But behind Shinobu, there was more.
And despite the years that had passed, despite everything she had become, Mitsuri's eyes—wide with horror—tragically recognized one of the severed heads.
Her ex-fiancé's head lay mere inches away, his lifeless eyes staring into nothingness.
His mouth was frozen in a silent scream, his features preserved in permanent terror.
Shinobu only held her tighter, a contented sigh ruffling Mitsuri's hair.
"Do you like it?" The question was soft, almost tender. "I must admit, he was rather difficult to track down, given how little information you provided. Kanao has been such a help!"
Mitsuri could cling to her perfect, manufactured reality for just a little while longer.
She could pretend a little more.
"Shinobu." Her voice was barely a whisper. "I'm hungry."
It was a distraction for them both.
"We can fix that in an instant!" Shinobu's tone brightened immediately, effortlessly light—as if she were simply pleased to accommodate a simple request. "Just let me call Aoi to clean up this mess. You can head to the kitchen."
Mitsuri obeyed. She pressed a final, fleeting kiss to her lover's lips—soft, familiar, almost comforting—before turning to leave the gruesome scene behind.
As she walked away, she could feel Shinobu's gaze following her. Intently. Possessively. Adoringly.
Shinobu still knelt gracefully on the blood-stained floor, surrounded by the evidence of her devotion.
And in that departing glance, Mitsuri saw with perfect, chilling clarity the fresh, dark crimson stains blooming on Shinobu's lips.