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Princess Kunai

Summary:

Reborn as a child in a world ruled by shinobi, Diana remembers everything Themyscira, her sisters, her friends, every battle, and the powers she once wielded. But her new body is young, her strength diminished, and the rules of this world are unlike anything she has known.

Here, children become weapons. Villages are built upon bloodshed. And the so-called Ninja Way teaches that sacrifice, obedience, and killing are simply the price of peace.

Diana refuses to accept that.

As she grows stronger, fragments of her former power return, but so do the consequences of standing against an entire culture. Caught between the warrior she was and the child she has become, Diana must navigate friendships, rivalries, war, and loss while asking one dangerous question:

What happens when the Princess of Themyscira decides the Ninja Way is wrong?

Notes:

Hello AO3! This idea has been sitting on my head for a while I've always loved the concept and lore of Wonder Woman and even more so the story of Naruto. After many years I was hoping someone else would've came up with the motivation and idea to crossover these two so I could relish in my two worlds coming together but I guess I have to take it in my own hands :x

This story is going to be a long one, I already have a couple chapters written out but the goal is to make it a 100k+ word story so buckle up for this roller coaster of a fic!

Enjoy :)

Chapter 1: Prologue

Chapter Text

Prologue - The Reborn Hero

Cold came first.

Not the clean cold of mountain wind or rain against steel. This was violent- a shock that tore across skin she could not feel properly and lungs that did not yet know how to work. Pressure vanished. Light struck. Sound broke over her in a hundred pieces.

She tried to breathe and drowned in air.

A cry burst from her, raw and involuntary.

No.

The thought came sharp as a blade, but nothing else obeyed. Her limbs jerked. Her fingers curled and uncurled. Her chest hitched in useless, uneven spasms.

She had been injured before. Struck down. Pinned. Bloodied. Exhausted. She knew pain. She knew disorientation. She knew how to wake after violence and gather herself piece by piece.

This was different.

This was not weakness.

It was the absence of control.

Hands lifted her. Firm hands, careful hands. Fabric rasped against wet skin. A woman’s voice spoke close by, low and strained with exhaustion. Another answered, deeper and unsteady with relief.

Language brushed her mind and slipped away.

Her eyes opened or she thought they did but the world remained a blur of white, brown, and moving shadow. A face leaned over her. Dark hair, perhaps. Warm breath. A hand supported the back of her head.

Her head.

Too heavy.

The cry faltered. She sucked in a breath, coughed on it, and felt panic surge anew. She could not even breathe on command.

Something wiped her face. Cloth. Gentle and efficient. She was turned, wrapped, enclosed in warmth after the shock of open air. Her body resisted the swaddling with a weak, frantic thrash that accomplished nothing.

No, she thought.

No, no-

Memory struck.

Not all at once. Fragments bright, jagged, and impossible.

Bronze beneath her feet. Sunlight on stone. A sword hilt against her palm. A voice calling her name across a training ground. The instinctive cataloging of exits, weapons, and threats in every room.

Then another flash, harder and final.

Motion.

Impact.

A body shoved behind her.

Pain, brilliant and deep. The world tipping. The certainty that she had failed only if the other person died.

Then darkness.

She knew what had happened before she was willing to name it.

She had died.

But she had not stayed dead.

Her entire body went rigid in the stranger’s hands.

The cry that came out of her this time was thinner and strangled. Beneath it, thought sharpened into horror.

She remembered.

She remembered too much.

The woman spoke again. This time, meaning caught in pieces.

“...strong lungs.”

A pause.

Then the deeper voice, roughened by emotion. “Like her mother.”

Her.

The room lurched inwardly. Whatever stable ground thought should rest on split beneath her.

She forced herself to listen.

The first voice belonged to a woman. Worn thin, but steady.

“Let me see her hand.”

A hand enclosed one of hers and relief surged through her at the contact. Something solid. Something to orient by. She tried to close her fingers deliberately, to test the shape and scale of this body.

Her hand closed.

So small.

The realization landed with grotesque clarity. Small fingers. Soft skin. No calluses. No strength she could locate and direct, only spasms and reflexes.

The hand holding hers was enormous by comparison, warm and dry, callused in ways she recognized immediately. Old ridges. Scar tissue. A controlled grip.

Not a dream.

Not a vision.

A body.

A new one.

Her stomach lurched-or whatever part of this tiny body could still be called a stomach. She tried to inhale deeply and managed only another shallow hitch.

“Good grip,” the woman murmured.

The man laughed once, breathless and incredulous. “She just arrived.”

“Mm.”

That single sound carried more thought than his laugh.

She forced her eyes open wider. Shapes shifted through tears and blur. A face emerged: pale skin, dark hair damp against the temples, eyes shadowed with exhaustion. Not beautiful in the polished, ceremonial way she once would have described beauty. Real. Drawn. Focused.

The woman.

A second shape leaned into view beside her. Broader jaw. Nervous mouth trying and failing not to smile. Shoulders tight with held breath.

The man.

Both strangers. Both looking at her with an emotion too huge to understand and too immediate to ignore.

The man said something softly to the woman, then another phrase aimed at the bundle in her arms.

“Nao.”

The sound struck her and lingered.

“Nao,” he said again, gentler.

Her.

A fierce resistance rose at once. She had a name. She had lived inside it, fought beneath it, carried duty and grief and love within it.

Diana was not a cloak to be discarded because a stranger had spoken another word over her.

But the protest dissolved against the crushing reality of her body.

She could not speak. Could not sit up. Could not demand answers or refuse them. She could not ask what world this was, what gods had done this, or what law of death she had somehow slipped through.

She could only lie there, wrapped too tightly, breathing too hard, staring through newborn-blurred eyes at two people who believed she had just begun.

Panic threatened again.

She fought it with the only weapon left to her.

Observation.

The room was modest. Wood overhead. Paper-screened light. Cloth folded in neat stacks. A basin nearby, steam rising faintly from its surface. Not sterile. Not ceremonial. Prepared. Efficient. Lived in.

A bag rested near the far wall, half-open. Even through her poor vision, she caught the hard geometry of tools inside.

Not kitchen tools.

The woman adjusted her hold with practiced economy, never jostling more than necessary. She moved like someone accustomed to precise effort while tired. The man kept glancing toward the door and window not nervously, but habitually, as though part of him remained alert to an outside perimeter.

Trained, some detached part of Diana thought.

Not ordinary soldiers. Something adjacent.

The woman noticed the direction of her gaze or perhaps only the movement of her unfocused eyes. For the first time, her expression changed.

Not softer.

Sharper.

“She tracks quickly,” the woman said.

The man blinked. “Can newborns do that?”

“Not well.”

His smile faded.

The woman looked down at her again, and this time Diana felt the scrutiny in full. Not fear. Not yet.

Evaluation.

Diana’s old instinct rose in answer. Measure in return.

The woman was exhausted enough that one shoulder dipped lower than the other. Pain there, or strain from labor. Her hands were too callused for a sheltered life, the left thumb thicker at the base. Repetitive grip work. Weapon use, perhaps.

The man’s knuckles were scarred in a more irregular pattern. Broader wear. Different training. Different specialty.

The absurdity of assessing them while unable to hold up her own head nearly broke something inside her.

Emotion surged too quickly for such a small body. Grief. Humiliation. Rage without a target. She had died and somehow woken here, reduced to helpless flesh while memory remained intact enough to show her exactly what she had lost.

Her eyes stung.

A fresh cry built in her throat.

No, she thought desperately. Not again.

It came anyway.

The sound was thin and exposing. Her hands clenched. Her legs kicked weakly against the wrapping.

The man reached toward the blanket. “Maybe she’s cold—”

“Wait,” the woman said.

He stopped.

The single word altered the room.

Diana could not have obeyed even if she had wanted to. Her distress spiraled, feeding on its own uselessness. Her breathing would not settle. Tears leaked from eyes that barely worked. The blanket pressed too close. Her skin felt wrong too new, too fragile, as if she had been stripped down to infancy and left conscious inside it.

The woman shifted her, perhaps trying to resettle her.

Diana’s hand caught the woman’s wrist.

Not deliberately. Not entirely.

Some blend of instinct, flailing, and refusal closed her fingers around warm skin.

The woman went still.

Diana felt the tendons in her own hand strain. For one suspended second, she did not understand why the room had fallen silent.

Then the woman inhaled sharply.

“What is it?” the man asked.

The woman did not answer.

She looked down at the tiny hand around her wrist.

The skin beneath Diana’s fingers was reddening.

Not crushed. Not badly injured. But marked.

The man saw it a moment later. His silence was worse than alarm.

Diana tried to let go.

She sent the command with all the force of habit, training, and lifelong bodily mastery.

Her fingers opened only in clumsy stages.

The woman eased her wrist free without jerking away. Her face had gone very still.

“Did she-” the man began.

He stopped, unable to finish.

The woman turned her hand, examining the marks already forming. When she spoke, her voice was level, but no longer merely tired.

“She shouldn’t be able to do that.”

The room seemed to shrink.

Diana lay in the cradle of the woman’s arms, swaddled and helpless, and understood that she had made the first impression of this new life not as daughter, not as infant, but as anomaly.

The man looked at her, then at the marks, then back again as if repetition might change the evidence.

The woman met his eyes over Diana’s small body.

No one smiled.

Diana stared at the reddening skin around the woman’s wrist.

They had expected a daughter.

What they had received was something else.