Threads of Crimson (Fan Fiction)
EPISODE 1: The new girl in shibuya
Author
Welcome to Threads of Crimson. This story is a fan-made work inspired by Jujutsu Kaisen, blending action, supernatural horror, and a touch of dark romance. It follows Arisa Kurobane, an original character whose fate becomes dangerously intertwined with Sukuna’s.
Author
This fanfiction is purely for creative enjoyment — not affiliated with or part of the official Jujutsu Kaisen universe.
I hope you enjoy diving into Arisa’s story.
Arisa Kurobane never believed in fate. She believed in anime marathons, late-night ramen, and the way stories made her heart race. Jujutsu Kaisen was one of those stories — a dark, thrilling escape from the dull pace of her real world.
But tonight, something shifted.
She remembered hitting play on her laptop, Yuji charging forward with Megumi at his side. Then… nothing. A tug in her chest, a dizzying pull, and when her eyes snapped open, she wasn’t staring at her bedroom ceiling.
She was lying on cold pavement. Neon signs buzzed overhead. The air was thick, heavy with a pressure that made her skin crawl. She sat up fast, panic tightening her throat.
Shibuya. This looks like Shibuya.
Her phone buzzed in her pocket. Relieved, she grabbed it — only to freeze. The wallpaper was different. The apps were the same, but the contacts weren’t hers.
At the top of the notifications was a group chat:
“Jujutsu High 🖤🔥”
Her stomach flipped. She knew that name.
Group Chat — Jujutsu High 🖤🔥
Yuji
Yo!! Who’s the new number Gojo-sensei added?? 👀
Nobara
Probably another idiot.
Arisa
Wait..This can’t be real
Yuji
LOL what can’t be real?
Nobara
Oh great, she’s already weird.
Arisa’s pulse hammered. These names. This chat. No way.
Yuji
Haha, don’t worry! We don’t bite. Well… except Nobara.
Nobara
Watch it, Itadori.
Arisa
Arisa. Arisa Kurobane.
Yuji
Nice to meet you, Arisa!! Welcome to Jujutsu High 🔥
Nobara
Ugh. Another newbie.
Megumi
Do you have cursed energy?
She lifted her hand without thinking. A faint shimmer — black sparks, like static — crackled over her fingers. Her breath caught. She felt it, thrumming through her veins like a second heartbeat.
Yuji
Awesome! Then you’ll fit right in.
Nobara
If she doesn’t die first.
Nobara
WHAT?? I’m just saying.
Arisa lowered her phone, staring at her hands. In her old world, she was nobody special — just another girl with exams, dreams, and too much time on the internet.
But here… her body wasn’t the same. It had power. And power in this world came with a price.
The city around her seemed alive with shadows. A flicker in the alley. A shiver in the neon glow. She swallowed hard. She knew what that meant.
Curses.
Group Chat — Jujutsu High 🖤🔥
Yuji
Don’t freak out, okay?
Megumi
We’ll meet you soon. Gojo insisted you join us.
Nobara
He’s probably laughing somewhere, dropping another newbie into our laps.
Yuji
Don’t worry! We’ll protect you. That’s what senpais are for 😎
She hesitated, then typed quickly:
Arisa
Um… one question. This might sound dumb
Nobara
All your questions will sound dumb.
Arisa
Where am I supposed to go?
Megumi
Tokyo Jujutsu High. Send me your location.
She glanced around at the bustling street signs. Shibuya. Her heart squeezed. She knew what happened here. She’d watched it play out on screen.
But now it’s real. Now I’m inside it.
As she typed her location, a wave of unease passed through her chest. She froze.
It wasn’t hers.
It wasn’t fear. It wasn’t hunger. It was something deeper — ancient and cruel — stirring for just a second in the pit of her stomach.
Yuji’s contact icon flickered green in the chat. He’d gone silent.
Yuji
Weird. For a second, it felt like Sukuna twitched inside me.
Nobara
Ew. Don’t say it like that
Megumi
Maybe he sensed something.
Arisa
(typing, then deleting)
Her throat went dry.
No. Sukuna couldn’t know. Not yet.
Arisa hugged her phone to her chest. She could still feel it — that faint echo, like a monster shifting in its sleep.
She’d wanted to be part of this world once, in the safe distance of fiction. But standing here, cursed energy crackling at her fingertips, the King of Curses stirring somewhere in Yuji’s body…
She realized she wasn’t a spectator anymore. She was a thread tangled in the fabric of this world.
And if Sukuna ever noticed her, if his eyes ever turned her way—
She might not survive it.
EPISODE 2: First Exorcism
Group Chat — Jujutsu High 🖤🔥
Yuji
Okay Arisa, Megumi and I will meet you at Shibuya Station. 👊
Nobara
Don’t expect a warm welcome.
Megumi
Ignore her. Just wait by Exit 5.
Arisa tucked her phone away, heart pounding. She’d watched these characters laugh, fight, bleed on screen. Now she was about to meet them.
And this time, there was no pause button.
Shibuya Station bustled with life. Salarymen rushed, neon signs blinked, and Arisa tried not to look like a lost child.
Then she saw him — messy pink hair, bright eyes scanning the crowd until they landed on her. Yuji Itadori.
Arisa?” he called, jogging up. His grin was so warm it disarmed her instantly.
Behind him came Megumi, calm and sharp-eyed, and Nobara, arms crossed with a skeptical glare.
Nobara
So this is the newbie,”
Yuji
She’s nervous. Don’t be mean.
Nobara
I’m not mean, I’m realistic,”
Megumi
Both of you, quiet,”
Before Arisa could respond, a familiar figure appeared — blindfold, lazy smile, waving like this was all casual. Gojo Satoru.
Gojo
Yup, that’s her,”. “Our new little mystery transfer. Arisa, welcome to Jujutsu High.”
The campus loomed, hidden in its veil of magic. Arisa’s skin prickled as they stepped inside. She wasn’t just a visitor. The cursed energy in her veins thrummed, resonating with the barrier itself.
Gojo strolled ahead, hands in his pockets.
Gojo
Normally I’d do the long introduction, but let’s throw you straight in. Nothing beats a little field practice.”
Nobara
Perfect. We’ll see if she survives.”
Arisa
Field practice? Already?
Group Chat — During Mission Prep
Yuji
Don’t worry Arisa, first missions are always easy. 😁
Nobara
Lies. Sometimes the curses are nasty.
They arrived at a run-down apartment complex reeking of decay. The air was heavy with curse residue, like rot crawling under her skin.
Yuji
Reports of disappearances. Should be a grade 3 curse. Easy warm-up.”
Inside, the halls were dark, walls stained. Arisa’s breath hitched as something slithered across the ceiling.
A curse.
It was grotesque, with too many limbs and a face like melted wax.
Megumi summoning his divine dogs. Yuji lunged forward with fists raised, grinning even in danger. Nobara readied her hammer.
Arisa froze, heart racing. This wasn’t anime anymore. This was real. The thing’s presence pressed against her chest, suffocating.
But then — her body moved. Power surged from her hands, black static rippling.
The curse turned toward her instantly, screeching, abandoning the others.
Nobara
Why’s it targeting her?!
Megumi
It’s drawn to her energy.”
Too late. The curse lunge
Group Chat — Emergency (Arisa’s Phone Buzzing Mid-Fight)
Nobara
Don’t just stand there!!
The curse’s claws swiped—then met a burst of black sparks erupting from Arisa’s chest. The blast hurled it back against the wall, leaving a scorched mark.
Megumi
That wasn’t normal cursed energy.”
Arisa panted, trembling, staring at her own hands. The power still crackled, burning in her veins.
Subtle Sukuna Foreshadowing
Yuji staggered for a second, gripping his chest. His smile faded, eyes narrowing in discomfort.
Inside him, Sukuna twitched. Not awake. Not speaking. Just a shift, like a beast stirring in its cage.
Yuji said quickly, straightening. But his eyes flicked once toward Arisa.
As if some part of him — or something inside him — had reacted to her.
Arisa saw it. Her stomach sank. She didn’t need him to say the name. She already knew.
Sukuna had stirred.
Group Chat — After Mission
Yuji
You did great for your first mission 😅
Nobara
Or she nearly got us all killed.
Megumi
Either way, she’s staying. Gojo said so.
She closed her phone, heart racing.
Arisa had wanted adventure once. She’d dreamed of what it would be like to stand beside heroes, to fight against curses.
But now that dream had teeth. And somewhere in the dark, the King of Curses had stirred in his vessel, closer than ever to noticing her.
Arisa gripped her necklace, the faint golden glow steady against her skin.
How long until he looks my way?
EPISODE 3: The Strongest Tests The Strange
Group Chat — Morning After Mission
Yuji
Arisa!! You did amazing yesterday 🤩
Nobara
She almost got shredded by a grade 3.
Megumi
She did hold her own.
Yuji
Don’t worry. First missions are always rough. Mine was way worse.
Nobara
You swallowed a cursed object, Yuji.
Arisa smiled faintly at her phone. Their banter almost felt normal. Almost.
Then a new message popped up.
Gojo
Arisa, meet me at the training field. We need to talk.
Her stomach flipped. When Gojo Satoru said “we need to talk,” it couldn’t be good.
Training Field
The training field stretched wide, sunlight glinting over the dirt. Gojo stood there waiting, hands in his pockets, blindfold tilted lazily like he didn’t have a care in the world.
Gojo
Morning, Arisa~!” Sleep well after blasting a curse to pieces?”
Gojo
Didn’t think so. That’s why we’re here. I need to know what you are.”
The words sent a chill through her. “
Arisa
“I’m… just me. Arisa Kurobane.”
Gojo
Maybe. But normal sorcerers don’t make curses abandon fights to come at them. Your energy? It’s sticky. Heavy. Curses love it. And it’s not cursed energy I’ve seen before.”
Arisa
So what does that mean?”
Gojo
That’s what we’re gonna find out.”
Training Test 1 — Cursed Energy Flow
Gojo
focus cursed energy into your hand. Like this.”
He raised his palm, shimmering blue energy coating it smoothly.
Arisa copied him. Dark sparks crackled instantly, but instead of wrapping her hand, they crawled outward in jagged lines, leaking like smoke.
Gojo
Not bad. But see? Your energy doesn’t contain itself. It’s aggressive.”
Gojo
Like it wants to consume instead of protect. That’s… unusual.”
Training Test 2 — Resistance
Gojo suddenly stepped closer.
Gojo
try to push me back with your energy.
Arisa
Push you? You’re Gojo—”
Gojo
C’mon. Don’t hold back. I’ll be gentle.”
She focused, letting her cursed energy swell. A blast of black static erupted toward him—
And stopped. Inches from his chest, it fizzled, pressed flat against an invisible barrier.
Gojo’s Infinity shimmered faintly around him. He didn’t even blink.
Gojo
See? This is what control looks like. Yours is raw power. A lot of it, actually. But messy.”
Gojo
Not failed. Just… dangerous
Training Test 3 — Pressure Sparring
Gojo clapped his hands once. “
Gojo
Don’t worry, I won’t break you.
She swallowed, lifted her fists awkwardly, and let the energy spark around her again
Gojo stepped casually into range
Arisa struck. Sparks flew. The ground cracked where her energy spilled over. But every swing met empty air, Infinity stretching the distance.
Her frustration grew, power leaking sharper, darker. The static spread like claws across the dirt.
For just a second, her vision blurred — black shapes coiling at the edge of her sight, like shadows whispering.
Gojo’s smile flickered. Just slightly.
Then he raised his hand, tapping her forehead gently.
The energy cut off, leaving her gasping, heart racing.
Gojo
“Not bad. But that wasn’t normal cursed energy. It’s old. Feels… wrong.”
Gojo’s grin returned, but it didn’t reach his tone.
Gojo
Let’s just say, if I didn’t know better, I’d think your energy belonged to a curse, not a human.”
Gojo
I know,” . “That’s what makes it interesting.”
He turned away, hands in his pockets again. “
Gojo
Don’t tell the others yet. No need to make them nervous.
As he walked, Arisa stood frozen, his words echoing in her chest.
Subtle Sukuna Foreshadowing
Back in the dorms, Yuji jolted awake from a nap, clutching his chest.
Sukuna had stirred again, more sharply this time, like a predator scenting prey.
Yuji rubbed his head, uneasy. “Weird. It’s like… something’s calling him.”
He didn’t say who.
But if Sukuna was starting to notice Arisa, it was only a matter of time before the King of Curses opened his eyes.
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