After Gon's battle with Neferpitou…
At the moment when his rage devoured everything around him…
His body collapsed, barely alive.
No doctor could help him.
What he needed went beyond human medicine.
No one understood the level of power he had reached—or what he had done to himself.
But Killua didn't stop.
He knew the family's secret could save him.
He ignored his father's orders.
He confronted Illumi,
Because he was ready to do the impossible.
Nanika.
The entity living inside his sister, Alluka.
Killua believed she was the only one who could save Gon.
And she did.
She brought him back to life.
But something changed.
A responsibility fell on Killua—
To protect Alluka and Nanika together…
Even though he still didn't understand what Nanika really was.
Nor where she came from.
All he knew
Was the promise he made:
To give Alluka the life she dreamed of…
A life whose meaning he only understood because of Gon.
And yet, a silent question followed him everywhere:
"Can he truly succeed in this?"
*****The days after…
When Killua began his journey with Alluka, the first days were peaceful—full of laughter and small adventures.
But with time, Killua noticed something strange:
Alluka grew unusually quiet.
He thought she had simply lost her spark.
She started forgetting things…
She didn't follow his stories the way she used to…
And she acted without remembering her own actions.
His sense of responsibility kept him alert.
One night, Killua pretended to sleep.
In a blink, when he opened his eyes, Alluka was no longer in the room.
He slipped out silently and found her standing on the rooftop, staring at the sky with a still, empty expression…
As if she didn't belong to this world.
He didn't wake her—just watched.
But a chill ran down his spine.
In the morning, he gently asked:
— "Do you remember going out last night?"
She looked confused and said she never left the room.
Are you joking with me, Killua…?
That's when he understood.
The one who left the room wasn't Alluka—
It was Nanika.
From that moment, fear crept into him—
Fear of losing control one day…
And a deeper fear of the hallucinations haunting his dreams.
As if Nanika was trying to speak to him from another realm.
***Killua's Dream***
The night was calm, the wind brushing softly through the trees.
But Killua felt a heavy pressure as he tried to fall asleep—
As if the air itself had stopped flowing.
He closed his eyes.
When he opened them…
He found himself in a long corridor bathed in faint blue light.
It resembled the Zoldyck mansion, but endless…
Doors on both sides—every one of them locked.
A voice echoed behind him—childlike, yet unsettling:
"So it's you, Killua…
Come closer. You look scared."
— "Are you afraid of me?"
He turned slowly…
Alluka stood there, smiling—
But her eyes were pitch black.
He knew that look.
It was Nanika.
He stepped forward, voice trembling:
— "You promised not to appear again… you promised me, Nanika."
She whispered softly:
— "I didn't break the promise…
She is the one who lets me out.
She wants me to be with you.
When she sleeps… she opens the locked doors for me.
She knows what I feel—we're the same person.
I just… breathe a little.
I don't want to hurt anyone."
He moved closer, shaking with anger and pity:
— "But you're taking over her!
You know each of you has your own world—and yours is darker.
She's losing her memories… her life is slipping away because of you!"
Silence fell.
Nanika finally spoke in a heartbreaking whisper:
— "I'm sorry…
But if I die… she dies too.
We are one body with two souls.
Don't separate me from her, Killua…
Because if you do…
You'll lose her forever."
The corridor began to melt, the doors creaking open, whispers and distant cries filling the space.
Before he woke up, Nanika whispered:
— "Sorry… sorry…
Brother Killua is upset because Nanika is bad."
Killua jolted awake, breath quick and uneven.
The room was dark—
But something was wrong.
He didn't hear Alluka breathing.
He sat up immediately.
— "Alluka?… where are you?"
No reply.
He rushed into the hallway—silent, cold.
On the floor, he found her sketchbook.
The page was covered in tangled black lines…
And beneath them:
"She doesn't sleep when I sleep."
His blood ran cold.
He hurried to the roof—the same place from his dream.
He found Alluka sitting there, staring at the horizon.
He sat beside her quietly.
After a while, she said in a childlike voice:
— "I saw a dream, Killua…
You were in it…
But that wasn't my smiling brother."
He smiled faintly, brushing her hair.
— "It's good… that Alluka only sees Killua there too."
But inside him, he knew—
The battle had already begun.
***Chinbara Bay — The Hunt for Answers***
Killua and Alluka moved to Chinbara Bay.
He needed to learn more about spiritual realms and beings from beyond.
But he found nothing resembling Nanika.
No record.
No trace.
Nothing.
He avoided asking too loudly—
He feared hunters would target Nanika if he drew attention.
The place was known as "the Cold Edge"—
Filled with fanatics obsessed with supernatural phenomena and unexplainable creatures.
With time, Alluka's condition worsened:
She barely ate.
She couldn't sleep—
Or rather, didn't want to sleep.
Even Killua suffered—
His anxiety turned into nightly nightmares,
Seeing himself die,
Or watching Alluka lose her soul forever.
He needed guidance.
He didn't want to hurt Nanika—
But what was the solution?
He heard rumors of a mysterious book—
A book said to reveal answers.
How it worked or where it was? Unknown.
Whether it truly existed? No one knew.
He infiltrated hunters' meetings where enchanted relics were sold.
Talismans, spiritual artifacts—nothing reliable.
He then joined a group called Hikari-Kai(光会)
They claimed to confront negative energies summoned by otherworldly beings.
But their record was empty,
Years of work, yet they had never encountered a single entity.
Their leader was a man named Khayri.
Everyone in the group had their own method of seeking the truth.
After digging deeper, they reached an old story:
A fisherman once found a creature inside a sealed box that washed ashore.
He opened it… and fainted instantly.
When he woke up, he had lost his hearing—
Except for one voice…
Begging him to find a certain book in exchange for returning his hearing.
He repeated this story for months—
Until the voice drove him insane.
The group located him, guided by a relative they paid.
Killua approached him first.
Everyone could see he wasn't afraid,
but the others trembled, overwhelmed by the heavy, sinister aura surrounding the man.
The man lived in total isolation,Answering no question.
Only scribbling a lullaby in strange symbols
And humming a chilling tune along with it.
The group tried deciphering it… and failed.
They even posted a reward online to anyone who could solve it, despite their reluctance.
The comments flooded:
"Damn you… stop bringing disasters into our world."
"These are symbols from the Dark Continent….....?"
"Almost no one returns from there…"
"The last scientific expedition disappeared….!"
Killua felt despair tightening—but he refused to stop.
He came up with a plan, a desperate thought:
What if… there was a being who could decode it?
What if Nanika… was the key?
He remembered his father's words.
If Nanika could decipher it, he would finally know the truth.
Killua prepared to take the risk.
He planned to make it look normal for Alluka
And find a way to request Nanika's help.
But the risk was enormous.
Success or failure—
Either one could cost him everything.
Here's the English translation of your passage, keeping the tone, suspense, and interactions intact for publication:
Killua returned to Alluka, carrying her favorite food and ice cream.
He sat in front of her, smiling despite the exhaustion in his eyes:
— "I guess you felt bored by yourself… sorry. Come on… let's eat and play. What do you think?"
Alluka's face lit up instantly:
— "Wow! What's the game?"
Killua, pretending confidence, said:
— "Riddles."
Alluka clapped enthusiastically, her eyes sparkling as if ready for battle:
— "Let's start!"
Killua: — "A simple one… something that is broken before it's used. What is it?"
Alluka murmured thoughtfully, placing her hand on her chin:
— "Hmm…"
Then she shouted:
— "An egg!"
Killua raised his eyebrows.
(I knew it was easy… but her answer came faster than expected. Good thing losing is part of my plan… otherwise I would have been doomed.)
Alluka leaned forward like a hunter watching her prey:
— "My turn! I'm a child of water… if you leave me in water, I die. Who am I?"
Killua lifted his head, feigning confidence:
— "Cloud?"
Alluka burst out laughing:
— "Nooo! Ice!"
Killua: — "Damn… I was close."
Time passed quickly, and in the end, Alluka won—exactly as Killua had hoped.
He approached her, pretending defeat:
— "Alright… what's the punishment?"
Alluka: — "Let's do a loser's challenge! Hmm… let it be three challenges!"
Killua smiled inwardly:
(Great… a step closer to my request.)
— "Okay… tell me."
Alluka: — "I want you to dance enthusiastically!"
Killua: — "Ah… I hate that."
But he danced. His awkward moves made Alluka fall to the floor laughing.
She raised two fingers:
— "Two more requests!"
Killua's heart raced:
(I hope they're simple…)
Alluka: — "I want something that shines… like your eyes!"
A faint smile appeared on his lips. He turned off the light with the biscuit tin, then gathered soft sparks of electricity in his hands, shaping them into a spinning star… like a tiny galaxy glowing in the dark.
Alluka gasped:
— "Wow! You're a magician!"
His cheeks flushed slightly.
Then, suddenly, she pointed at the phone:
— "I want to talk to Gon."
Killua froze.
The signal was dead there… a disaster if he couldn't connect.
But he steadied himself:
— "I'll try."
He tried calling… nothing.
A heaviness pressed on his chest.
Then an idea struck him. He sent a message to Rejil, the youngest member of Hikari-Kai (光会):
— "Answer the call. Don't complicate things. I'll explain later."
He called… moments later, Rejil responded.
Killua instantly changed his voice:
— "Gon! Can you hear me?"
Rejil was confused but had to play along.
Alluka grabbed the phone: — "Hello Gon… how are you?"
Rejil, embarrassed: — "I'm… fine."
Killua clenched his teeth, watching her expressions.
Then came the short, dangerous silence.
Alluka, in a low voice: — "Something's strange…"
Killua ground his teeth. He snatched the phone and hung up quickly:
— "Sorry… the signal dropped."
Alluka looked down.
Then whispered:
— "Gon… he doesn't seem well."
She slowly raised her head… her eyes wide, breath caught…
— "Or maybe… it's not Gon."
Killua's body stiffened.
At that moment—a faint tremor behind her…
Nanika appeared.
Her pitch-black eyes fixed directly on Killua:
— "my brother Killua doesn't have to hide anything."
His heart trembled.
The silence following her words was more terrifying than any threat.
(If she chose to punish me… what would she do?)
Killua swallowed hard:
— "I'll try again… just… wait for me."
He kneeled involuntarily. He closed his eyes…
Then suddenly—
The phone rang.
Slowly, he lifted it.
He read the name. His breath quickened.
— "…Gon?"
He pressed the answer button.
A tired but real, warm, deep voice came through:
— "Killua… can you hear me?"
Tears welled in Killua's eyes uncontrollably.
— "Gooon!!"
Gon chuckled lightly: — "I missed you… how are you? And Alluka?"
Alluka leaned forward eagerly:
— "Gon… are you okay?"
— "Yes, I'm fine… I'll get stronger like before, don't worry… and you all…"
After a few minutes, the call ended.
Nanika appeared again…
She bowed slightly, silent for a moment:
"My brother Killua would never have lied to me. I'm sorry."
He patted her head: "It's okay… you were just worried."
Killua turned to her seriously:
"Now I need something from you… can you write down this lullaby so I can understand it?"
Nanika wrote the words silently.
Killua grabbed the paper immediately… not wanting to draw attention.
Alluka returned to her normal self, and he told her to sleep.
He quietly left the room… then the house, walking as far away as he possibly could.
He climbed to the rooftop.
The cold wind slapped his face…
He stood under the darkened sky.
And finally, he opened the paper…....