Fire Beneath the Earth - Imagine Zuko x Earthbender! Reader, Part I
Synopsis/Request: I liked the dynamic between Zuko and Kyoshi, an earthbender; they remind me of a princess x knight vibe with genders swapped. I'd love another story about them, please?? Her discovering she's a lavabender (I find that sub-bending very incredible).
The ship moved through the dark sea with the steadiness of a blade slicing through fabric. Its prow cut through the deep waves in clean motions, leaving behind white trails that vanished almost the moment they were born. The late afternoon slowly dissolved across the horizon, staining the sky with burnt copper, ancient red, and violet shadows scattered between the clouds. It was a severe kind of beauty β the kind that did not invite admiration, only respect.
The wind blew damp and cold from the ocean, yet beneath the salt it carried something unexpected: the dry scent of old ashes, heated stone, and distant sulfur. As if the island, still many minutes away, was already announcing its presence before it could even be reached.
Ahead, Roku Island emerged through the sea mist like a memory made flesh. Dark, jagged against the blazing sky, with the volcano rising at its center like a sleeping sentinel. Motionless only to those who did not know how to listen. Because even from afar, there was a silent threat within it β a promise of restrained power.
Zuko stood alone at the bow.
Arms crossed, posture rigid, his weight distributed perfectly to withstand the rocking of the ship without even thinking about it. It was the kind of balance born from years in combat, years on the run, years spent living as though the world might demand a reaction at any moment.
His red cloak snapped behind him in sharp bursts of wind. The dying light of dusk carved shadows across his face and deepened the mark of his scar even further. Whenever he thought too much, his expression hardened like that β as if his mind pulled every muscle inward.
And he was thinking too much.
About the council he had left behind in the capital.
About the problems waiting for him upon his return.
About peace, which demanded more effort than any war.
The sound of your footsteps came behind him across the deck.
Neither hurried nor hesitant.
The footsteps of someone who never asks for space before entering it.
Zuko did not turn around.
You walked the way you fought: with precision. Every movement seemed simple until truly observed β then it revealed absolute control. Shoulders aligned, chin lifted, spine straight, center of gravity always steady. The green and gold paints of your Kyoshi armor emphasized your presence rather than softening it.
There was no crown on your head, no title accompanying you on that ship.
And yet there was something about you that resembled royalty more than many nobles could ever hope to convey.
Elegance built through discipline.
The kind of presence that never needs to announce itself.
You stopped beside him, turning your eyes toward the island.
For a few seconds, only the sea spoke between you.
Then Zuko broke the silence without looking at you.
βYouβve been staring at me for five minutes.β
Your answer came immediately, smooth as polished stone.
He let out a low sound, almost an irritated sigh.
βIβm glad to exceed expectations.β
You crossed your arms, mirroring his posture β fully aware of it, and choosing to do it anyway.
Your eyes traveled to the distant volcano.
βDo you always get this dramatic near burning mountains... or is that reserved for special occasions?β
Zuko turned his head just enough to glance at you.
βOnly near irritating people.β
You nodded with false solemnity.
βThen today youβre surrounded by danger on all sides.β
The corner of his mouth almost lifted.
A minimal movement, nearly invisible.
You saw when he tried to hide exhaustion behind rigid posture.
You saw when anger was only poorly translated concern.
You saw when silence meant internal war.
And especially, you saw when he was about to smile and abandoned it at the last second out of sheer pride.
On the outside, you seemed carved from polished stone. Cold at the surface. Steady. Impeccable. Everything about your body suggested discipline and restraint.
Inside, however, there were geological faults no one could see.
Affections compressed until they became too dense to touch.
Heat kept hidden for so long that you no longer knew whether it could ever escape without destroying something.
Maybe that was why Zuko irritated you so much.
He had the terrible, insufferable, and dangerously rare habit of noticing cracks.
Even when you had spent your entire life trying to hide them.
You looked away toward the horizon.
βThereβs still time to order the captain to turn this ship around.β
βYou were the one who insisted on coming.β
βI insisted on leaving the capital.β
You paused, watching the thin smoke rising from the top of the volcano.
βThereβs a difference between seeking rest and agreeing to spend days on an island haunted by memories of dead Avatars.β
You turned your face toward him slowly.
Slow enough for the gesture to seem deliberate. Fast enough for him to understand the warning.
Your eyes met his without wavering.
βAre you trying to provoke me, Fire Lord?β
The way you used the title made it sound like an insult and a flirtation at the same time.
The wind passed between you, tugging loose strands of your hair and throwing the hem of his cloak backward. The ship groaned beneath your feet. The sea struck against the hull.
You held his gaze for too long to be casual.
The kind of second that stretches.
That asks for a decision.
Then you answered, voice lower:
Zuko felt his chest tighten in a profoundly inconvenient way.
Before he could reply, a shout came from the stern announcing the approach to the makeshift dock.
Ropes were prepared. Men ran across the deck. The captain barked orders.
The island now filled the entire horizon.
Black stone. Thick vegetation. Steam escaping from natural cracks in the earth. The volcano watching everything from above as if it already knew exactly who was arriving.
You stepped forward first.
βIf there are hostile spirits here,β you said, adjusting one of your war fans at your belt, βI sincerely hope they choose you.β
Zuko uncrossed his arms and followed.
βIf there are intelligent spirits, theyβll ignore both of us and run from you.β
βStubbornness suits you.β
This time without hiding it.
βThen weβre dressed appropriately.β
The ship docked moments later.
And when the wood touched the stone pier of Roku Island, both of you felt the same thing β though neither of you would admit it.
As if something ancient, buried, and awakened by your presence had just opened its eyes.
The landing plank lowered slowly until it met the volcanic stone of the dock with a dry, heavy impact. The sound reverberated through the small cove in a strange way, as if the island itself had swallowed it and returned it in fractured echoes. For a brief instant, everything seemed suspended: the groaning ropes, the waves striking the hull, the hurried footsteps of the sailors. Even the sea, restless by nature, seemed to hold its movement before that dark shore.
Roku Island did not welcome visitors with warmth.
It welcomed them with presence.
The rock formations rose around the cove like natural walls, black and uneven, marked by centuries of heat and erosion. Between the stones, vegetation grew thick and stubborn, roots breaking through impossible cracks, broad leaves clinging to the rough ground as if defying fire itself. Higher above, nearly dominating the entire landscape, the volcano watched in silence.
A thin line of smoke rose from the summit and disappeared into the darkening sky.
Zuko was the first to disembark.
His boots touched the stone surface with controlled firmness, and he did not move forward immediately. He paused at the end of the plank for only a second, eyes sweeping across the terrain in one quick, precise motion.
Distance to the tree line.
Some people lost old habits when the war ended.
Others merely refined them.
The wind pulled the hem of his red cloak behind him as he moved forward a few steps, feeling the subtle heat rising through the soles of his boots. It was not intense. Not yet. But it was there, constant and quiet, like a fever the body learns to hide.
Behind him came the sound of your footsteps descending the plank.
You did not accept the sailorβs offered hand before he had even finished the gesture.
Polite enough not to be a direct insult. Sharp enough to make the man withdraw his hand instantly and decide, in the depths of his soul, never to repeat the attempt again.
You descended alone, posture impeccable despite the shifting wood. The plates of your Kyoshi armor moved with practiced restraint, making no unnecessary sound. Your face held the calm of someone who mastered their own body so completely that any ground became an extension of it.
Zuko watched the scene from the corner of his eye.
βCharming as ever,β he remarked, making no effort to hide the dryness in his voice.
You adjusted the wrap at your wrist, as though the comment deserved less attention than dust.
βAnd he still left unharmed. Clearly, Iβm maturing.β
βThe kingdom appreciates this historic progress.β
βDonβt thank me too early.β
You passed him without asking permission and walked several steps toward the edge of the black stone dock.
Your fingers touched the ground with almost reverent care.
From the outside, the gesture seemed simple. To any inattentive observer, it would have looked like an earthbender testing unfamiliar ground.
But for you, it was listening.
Your palm rested fully against the warmed stone.
The world reorganized itself.
The vibrations of sailors running across the deck came first: quick, light, disordered. The dragging of heavy crates created short, repetitive pulses. The waves striking the base of the dock throbbed in natural, cyclical, familiar intervals.
And beneath all of that...
A movement too slow for eyes, too heavy for words.
Like a colossal animal sleeping beneath layer after layer of stone.
You opened your eyes slowly.
You rose without hurry and lifted your chin toward the volcano.
For a moment, only the wind replied.
Zuko looked at the dark summit, then at you, then back to the volcano.
βYou know saying things like that in that tone does not help at all.β
βIβm not trying to help.β
βThat much I noticed.β
Even so, his gaze lingered on the mountainβs peak longer than he would have liked to admit.
A thin column of steam escaped from the side, winding upward into the newborn night sky.
The captain approached soon after, holding his hat in weathered hands. The man had crossed storm seas and faced pirates, yet at that moment he looked as uncomfortable as a recruit before two generals.
βFire Lord,β he said, bowing his head. βWeβll finish unloading the supplies and return to deeper waters. If you wish, Iβll leave two men to keep watch at the dock until dawn.β
βDo that. And keep everyone away from the northern slope. If you feel any stronger tremorββ
βRun with absolutely no dignity,β you finished calmly.
The captain blinked, caught in the middle of the sentence.
βHonestly, itβs an excellent strategy.β
The man decided silence was his greatest skill and retreated immediately.
Zuko exhaled through his nose, somewhere between irritation and restrained laughter.
βYou take genuine pleasure in frightening people.β
βI donβt frighten people.β
You began walking toward the trail that climbed the coast.
βI reveal emotional limitations. The reaction varies.β
βThat is a terrible sentence.β
The path narrowed between black rocks and low vegetation. The air grew warmer with every step, thick with the mineral scent of sulfur and damp earth. Thin threads of steam escaped from cracks in the ground, creating mist around your ankles.
Above you, the sky was already sinking into the dark blue of night.
βSometimes I forget why I keep bringing you with me,β Zuko said.
βBecause Iβm efficient.β
βBecause Iβm smarter than half your council.β
βThat is a low standard.β
βBecause Iβm pleasant company?β
He let out a short laugh.
βNow we know volcanic activity affects your judgment.β
You stopped several natural steps above him and looked back over your shoulder.
The wind carried light ash from the mountain, catching in the dark strands of your hair before disappearing.
Zuko held your gaze for far too long.
When he answered, his voice came low and unarmored.
βBecause when youβre not nearby... everything gets too quiet.β
No sudden gesture. No obvious expression.
But he saw the slight delay in your breathing. The nearly imperceptible tension in your fingers near the fan at your belt. The way your eyes shifted away for a second before returning to his.
βThat was dangerously honest, Fire Lord.β
βDonβt get used to it.β
You turned and continued climbing before your face revealed more than you wished.
They walked in silence for several minutes.
Not the uncomfortable silence of people who do not know what to say.
The kind that settles when two people listen too closely to each other.
The trail wound through ancient stone before opening onto a natural rise. From there, the ruins of Rokuβs old sanctuary finally appeared ahead: broken columns, cracked stairways, stone blocks partially swallowed by roots and moss.
Memory surrounded by living force.
You stopped so suddenly that Zuko halted as well.
Shoulders stiffened. Attention narrowed. Breathing grew shallow.
You did not answer immediately.
Your feet felt something beneath the foundations.
When you spoke, your voice was low enough to nearly vanish into the wind.
βThe mountain isnβt sleeping anymore.β
Then, from the depths of the volcano, came a deep and prolonged sound.
It was not exactly a roar.
It sounded like something immense, ancient, and contained for far too long finally beginning to move.
The sound moved through the entire island like an invisible wave.
It did not come loud at first, nor explosive like the sudden rupture of an eruption. It began deep below, low and dragging, so deep that the body recognized it before the ears did. The vibration rose through layers of rock, passed through ancient foundations, traveled across broken steps and cracked columns, reaching you through the soles of your boots and your bones.
The stone beneath your feet trembled.
The ruins answered with a chorus of small, uneasy noises: sand slipping through crevices, fragments breaking loose, old beams groaning, chips of stone rolling down the stairs in dry clicks. A thin cloud of dust drifted from the top of a broken archway and hung in the air for a moment before being carried away by the hot wind.
After that, everything fell silent.
Not the ordinary silence that follows the end of a noise.
A different kind of stillness.
A pause heavy with intention.
As if the entire island had held its breath.
Zuko reacted before forming a single thought.
His body moved on pure instinct: one quick step forward, another to the side, drawing closer to you while positioning himself between the more open section of the ruins and the retreat path. His eyes swept the terrain with trained speed.
Height of the remaining walls.
Possible escape routes if the hillside gave way.
Years of war turned certain reflexes into second nature.
βTell me that falls under the category of βnormal volcano noise,ββ he said, keeping his voice steady, though tension had hardened every syllable.
You did not answer immediately.
Feet planted on the black ground, eyes closed, face tilted slightly downward as if listening to an underground conversation only you could hear.
A strand of your hair moved in the hot wind blowing from the mountain. The rest of you stayed motionless.
When you finally spoke, your voice was far too calm to be reassuring.
Zuko let out a short, humorless breath.
βExcellent. Always good to eliminate positive theories early.β
Another tremor ran through the slope, shorter this time but more concentrated. The ground vibrated as if something heavy had shifted beneath the surface. A narrow crack opened several yards below, cutting diagonally across the trail. The stone split with a dry snap, and white steam burst from the fresh fissure in uneven jets.
Something in them had changed now.
And an unsettling gleam Zuko had already learned to associate with two possibilities: imminent danger or excessive curiosity in the face of imminent danger.
βIt isnβt just internal pressure,β you said.
You turned slowly toward the main structure of the ruins. The old sanctuary stood ahead in broken silhouette: shattered stairways, uneven platforms, columns toppled by time and fire.
βSomething is shifting the stone beneath the foundations.β
Zuko frowned immediately.
βSomethingβ as in animal?β
You stepped closer to a cracked column and placed your fingertips against the darkened surface.
βSomething as in structure. Mass. Ancient movement.β
βYou somehow sound worse with every sentence.β
βItβs a neglected talent.β
The wind changed direction abruptly.
Until then it had come from the sea, damp and sharp. Now it blew from the mountain, hot and heavy with sulfur, ash, and that intense mineral scent of earth forced open. The torches the sailors had left at the base of the trail flickered in the distance, their flames bending as if trying to flee.
Zuko did not like the feeling crawling up the back of his neck.
It was the same one that came before ambushes, bad decisions, or fires too large to control.
βYou do realize everything here is progressively getting worse?β he asked.
βAnd that doesnβt bother you?β
You cast him a sideways glance.
βIt bothers me. It simply doesnβt disorganize me.β
He gave a small, disbelieving laugh.
βThat may be the most irritating thing youβve ever said.β
βImpossible. I usually try harder than that.β
Another sound rose from the islandβs depths.
This time it came with a heavy crack, followed by the unmistakable sound of stone collapsing under its own weight. One of the sanctuaryβs side platforms sank several inches. Dust billowed upward along the edges. Fragments tumbled down the staircase.
βWeβre retreating. Now.β
You only knelt enough to press your entire hand against the warmed ground.
Your fingers spread across the dark rock. Your breathing slowed. Your shoulders relaxed into absolute concentration.
To anyone watching from outside, it looked like stillness.
The vibrations came in layers.
The unstable surface of the ruins.
The compressed tensions beneath the foundations.
Veins of heat winding through the mountain.
You felt the touch returned.
Not a random vibration. Not natural movement.
As if the island had noticed your presence the instant you touched it.
βWhat is new?β Zuko asked, growing less patient by the second.
You did not remove your hand from the ground.
βThe island is listening back.β
He stared at you for a full second.
βI need you to understand how much I hate that sentence.β
You lifted your eyes to him.
No pleasure in irritating him.
That was enough to silence him.
Zuko knew your sarcasm. Knew the way you cut through conversations for sport. Knew the quiet satisfaction you felt whenever you managed to make him lose patience.
But he also knew, with uncomfortable precision, the difference between that and raw truth.
And in that moment, you were telling the truth.
The ground split without warning.
The tremor came brutal and direct, sending a violent shock through the ruins. A crack tore through the central courtyard in an uneven line, splitting ancient stone like dry clay. The sound was loud, sharp, aggressive. Entire blocks tore free from a side wall. One column tilted dangerously.
He crossed the distance between you in two strides and grabbed your arm hard, pulling you backward at the exact moment the ground where you had been kneeling collapsed.
Stone exploded around you.
Dust rose in a thick cloud, swallowing the space for several seconds.
You lost your balance from the sudden force and collided into him. Zuko caught you by the waist before either of you fell, planting his feet on the unstable ground.
When the dust began to settle, you were far too close.
His arm still wrapped around your side.
His other hand still held your wrist by reflex.
Your fingers gripped the front of his tunic at his chest.
Both of you were breathing short and fast.
Your face was only inches from his.
Fine ash had settled on your lashes. A dark streak crossed the line of your jaw. Your usual scent of leather, weapon oil, and clean herbs had been overtaken by the smell of heated stone.
For one absurd and inconvenient instant, the mountain ceased to exist.
βLet go,β you said softly.
βYou were about to be crushed.β
βDo you always react badly when someone prevents your death?β
βOnly when it starts becoming a habit of yours.β
He held your gaze for one second longer before slowly loosening his arm.
You stepped back, straightening your posture and adjusting your armor as if your body had registered absolutely nothing about the contact.
βThank you,β you added dryly.
βWas that gratitude?β
βDonβt risk hearing another one.β
Before he could reply, a new tremor moved through the mountain.
Both of you turned at the same time.
High on the volcano, between cracks near the summit, orange lines began to appear beneath the dark skin of the rock. At first thin, almost subtle. Then brighter, pulsing red and orange like veins of light running beneath black stone.
The inside of the mountain glowed.
You felt the heat reach through the ground before it touched the air.
And with it, something inside you answered.
A sudden current ran through your arms to the tips of your fingers. Your chest tightened. Your breath failed for a second. The muscles in your hands contracted involuntarily, as if recognizing a forgotten language.
You had never felt that with ordinary earth.
Zuko noticed the change in you immediately.
You could not answer right away.
You kept staring at the mountain like someone seeing their own reflection where they never expected to find it.
Another glowing line appeared at the summit.
The volcanoβs inner light was growing in rhythmic pulses, almost like heartbeats.
Beneath your feet, the stone called to you in a way no earth ever had.
You stepped forward without realizing it.
His touch pulled you back to the present.
You blinked, looking first at his hand on your skin, then at his face.
Zukoβs fingers were warm. They always had been.
But now that warmth seemed to echo the same energy rising from the ground.
βAre you hearing something?β he asked, alert.
When you answered, your voice came low, disbelieving, and edged with something close to fear.
βThe stone... is burning.β
Zuko did not let go of your wrist immediately.
His fingers remained closed around your skin for a second longer than necessary, firm without hurting, warm without realizing they were. The contrast between that human warmth and the growing heat rising from the ground sent something strange through your body β a tension you could not tell whether it came from the danger, the mountain, or him.
The wind moved through the ruins carrying fine ash, which swirled around you before disappearing into the darkness. High above, the volcano pulsed with orange lines growing brighter by the moment, like embers hidden beneath cracked skin.
βThe stone is burning?β Zuko repeated, quieter now, trying to understand whether he had heard correctly.
At last, you pulled your arm back.
But fast enough to restore a distance that, for some reason, felt necessary.
βI know how it sounds.β
βGood, because it sounds terrible.β
You ran a hand over your wrist where he had held you, as though erasing the trace of his touch.
βEarth has weight, density, direction. You feel pressure, faults, movement. Rock responds in a specific way.β
Your eyes returned to the dark ground.
βThis... doesnβt respond like stone.β
βThen what does it respond like?β
You hesitated for a moment.
The truth sounded absurd even inside your own mind.
βLike fire trapped inside it.β
Zuko followed your gaze to the fractured ground between the ruins. Thin strands of steam still escaped the fresh cracks. The heat was increasing gradually, steadily, almost intelligently.
He knew fire in all its moods: disciplined, chaotic, defensive, hungry, destructive, obedient. He had grown up trained to read flames the way others read human expressions.
That was not exactly fire.
But it was not only earth either.
βWeβre retreating,β he decided, his voice returning to command. βNow. For real.β
βYou use that tone with me as if it works.β
βIt works sometimes.β
βWhen you almost died two minutes ago.β
You opened your mouth to answer, but the ground shook again.
This time it was not a sharp impact.
It was a prolonged shift, as if something enormous rolled beneath the islandβs inner layers. The ruins trembled all at once. A side staircase collapsed in sequence, step by step, throwing up thick dust. A column toppled and split in half with a crash.
Both of you moved at the same time.
Zuko raised his arms in a quick arc and sent a short, precise stream of fire to deflect stones flying toward you. The flames struck the larger fragments, changing their trajectory just enough for them to pass to either side.
You stomped the ground a heartbeat later.
A wall of black rock rose before you in a movement both brutal and elegant, catching the remaining debris before it could strike. The impact traveled through your arms like an echo.
When the dust partially settled, you stood protected behind the improvised barrier.
βIf you comment on the irony of me protecting you with stone while you protect me with fire, Iβm leaving,β you said, breathing a little faster.
βI was thinking something more about how your dramatic timing is impressive.β
He lowered his guard first, but did not step away.
Behind the stone wall, the volcanoβs orange glow reflected across his face in pulsing intervals. Light and shadow alternated over the Kyoshi paints of your armor. They made you seem less human and more like some ancient entity born from the island itself.
You noticed he was watching you.
βThat is not a crime.β
The corner of his mouth nearly rose.
Another tremor came, more violent than all the others before it.
The barrier cracked in two dry lines.
You turned immediately, pressing both hands against the stone to hold it upright, but the next impact tore through the entire structure. Heat exploded upward from the ground just ahead.
A fissure opened in the central courtyard.
This time, more than steam emerged.
Bright orange light burst from the opening.
Both of you froze for an instant.
Thick, glowing, incandescent liquid moved beneath the crack like blood through an open vein. Molten rock bubbled slowly, pushing the edges of solid stone aside.
You stared at it without blinking.
Something inside your chest answered violently.
Your hands tingled. Your arms throbbed. The ground beneath your feet ceased to feel like terrain and began to sound like music played too loudly.
βHey!β he repeated, louder.
Your eyes remained fixed on the glowing fissure.
The air around it warped with heat. The edges of your armor reflected orange. Your breathing had gone shallow.
Zuko grabbed your shoulder and turned you toward him.
This time you blinked, as if waking.
Your eyes met his, and there was something in them he had never seen before.
βI can feel it moving,β you said, almost in a whisper. βEvery current. Every weight. Every change of direction.β
βThen use that to get us out of here.β
βItβs not that simple.β
βThat is usually your favorite phrase when you want to irritate me.β
The use of his name without provocation was enough to cut through the sarcasm.
You took a deep breath, trying to steady yourself.
βIf I touch that... I donβt know what happens.β
He held your gaze for a moment.
The mountain roared in the distance.
Another fissure opened several yards to the left, spreading orange light across the ruined courtyard.
The ruins would not hold much longer.
βThen find out,β he said.
βThat is irresponsible advice.β
βIβm excellent under pressure.β
βYouβre insane under pressure.β
βAnd youβre the best earthbender I know.β
You stood still for a second.
Even surrounded by heat, collapse, and chaos, that sentence struck you with dangerous precision.
βWhatever this is... the island answered you. So answer it back.β
The world seemed to narrow.
Hot wind tearing through the night.
And him there, looking at you as though there were no doubt at all.
Then turned toward the fissure.
Knelt before the cracked stone.
And placed both hands on the incandescent ground beside the opening.