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Communion of Ash

Summary:

After a chaotic leyline escape tears the team apart, Ritsuka and a gravely wounded Jeanne Alter are flung into a dying, rain-soaked temple. With his Command Seals already spent, Ritsuka opens their Master–Servant bond to pour mana into her, then offering stubborn kindness she doesn’t think she deserves.

Notes:

Hello again!

Here is another One-Shot that i've been working on.

Enjoy.

(See the end of the work for more notes.)

Work Text:

The air in the ruined city was a physical weight, thick with the ash of incinerated familiars. A bitter wind whipped through skeletal high-rises, carrying the distant, victorious shrieks of the demonic host they had just narrowly escaped.

"We can't outrun them," Ritsuka gasped, skidding to a halt behind the rusted husk of a vehicle. His ribs screamed with every breath. "The Leyline convergence point—it's our only way out."

Da Vinci's voice was a strained crackle in his comms. "Confirmed. The coordinates are locked. But the convergence is unstable, Fujimaru. It's reading like a tangled knot. A forced teleport will be… turbulent."

"Turbulent is better than dead," Jeanne Alter snarled, her back to his. She stood as their rearguard, her black sword held ready, her gaze fixed on the approaching swarm darkening the sky. Her own breath came in ragged pulls; a long, shallow gash on her temple bled freely, mixing with the ash and dirt on her face.

"Just get us the window," Ritsuka said, his fingers already moving, tracing the preliminary summoning circle onto the cracked asphalt with a stick of chalk. The rest of the team—Mash, Mordred, and a wounded cu chulainn—formed a defensive perimeter around him.

"Thirty seconds!" Da Vinci announced. The air in the circle began to shimmer, the clean, blue light of Chaldea's systems fighting against the muddied, multicolored swirl of the tangled Leyline.

 

It happened in a heartbeat. A winged horror broke through the defensive line. It didn't aim for Ritsuka, but for the glowing circle itself—a creature intelligent enough to target their escape. Mordred's blade intercepted it, but the force of the impact sent the beast careening sideways.

It crashed directly into the edge of the forming teleportation field.

The effect was instantaneous and catastrophic. The stable blue light shattered. The tangled Leyline energies, suddenly released from Da Vinci's careful guidance, erupted. Reality itself seemed to tear. A silent, concussive wave of raw, chaotic power threw them all like rag dolls along all sorts of debris.

Ritsuka was lifted off his feet. The world became a vortex of screaming light and noise. In the maelstrom, a single, solid presence slammed into him. An armored arm hooked around his chest, pulling him tight against a body thrumming with defensive mana. Jeanne Alter.

He saw the rest of his team—Mash's shield flaring, Chulainn's wide-eyed shock—being pulled into a separate, brighter strand of the unraveling spell. Then, the light consumed everything.

He didn't land so much as the world solidified around him again. The shrieking wind was gone, replaced by a profound, ringing silence. The air was cold and still, smelling of dust and neglect.

 


The temple they found themselves in was erily silent. 

Marble ribs stretched upward, cracked by roots and rain. The frescoes had peeled into gray dust, and the air carried the faint sting of blood from a battle long finished. Only a few braziers remained alight — stubborn, blue and orange fires guttering against the weight of centuries.

Jeanne Alter limped across the shattered nave, one arm draped over Ritsuka’s shoulders. Her armor was little more than jagged plates; beneath it, blood leaked sluggishly, and the remnants of corrupted mana. She shielded Ritsuka from the debris and remaining familiars during their teleportation to this place, and now had to pay the price. Every step sent a ripple of pain through her frame, but she refused to falter.

“Here,” he said quietly, steering her toward the base of a fallen pillar.

“I can stand,” she snapped, though her legs buckled as soon as he let go.

“Not for long,” he murmured, catching her before she hit the stone.

Her glare could have flayed him alive. “I don’t need—”

“Jeanne,” he cut in, voice even. “You do.”

There was no anger in it — just finality. It silenced her more effectively than a Command Seal ever could. He guided her down, easing her back against the cold marble.

 

Outside, thunder grumbled over the distant hills. The storm had passed, but the rain persisted — a slow, rhythmic tapping through the cracked dome. Each drop echoed in the hollow, as if the temple itself were counting the moments left to them.

Ritsuka knelt beside her, the small medkit from his satchel open. “You’re losing cohesion. Your Saint Graph is unstable.”

Her lips curved in a brittle smile. “Then let it fail. A fitting end for a false servant.”

He didn’t answer, just peeled away a torn section of her armor. The hiss she made as the cool air touched the wound was sharp enough to cut the silence.

“You’re wasting your effort,” she said, watching him pour a vial of liquid prana, prepared for exactly situations like these, over the dark cut on her side. The blue light stung against her skin. “Your power is better spent elsewhere.”

His hands didn’t stop moving. “You say that every time someone tries to help you.”

“No one has tried since i came to be.”

“Then maybe it’s overdue.”

Her head turned sharply, hair plastered to her face. “You don’t understand what I am.”

He met her gaze then — calm, steady, infuriatingly gentle. “I think I do. You’re someone who doesn’t know what to do when kindness doesn’t come at a price.”

The words hit her harder than the pain. She looked away, jaw clenched. “You shouldn’t talk like that. You’ll make me think you are actually crazy enough to believe it.”

“I do.”

 

He finished wrapping the bandage, his breath a little shorter now. “That’ll hold for a few minutes. But the core wound… it’s draining you faster than you can regenerate.”

Her eyes slid to him. “You mean to say it—”

“Needs a mana transfer.” He nodded. “And I don’t have any Command Seals left. It’ll have to be directly through our bond.”

For a moment, the only sound was the rain’s drip and the faint hiss of exposed flames.

“You’re serious.” Her voice was low, dangerous.

“I am.”

“You know what that means. To open the Master-Servant bond in you state would be-”

“I know.” He looked tired, but resolute. “I trust you.”

The declaration stopped her cold. Trust. A word that once meant chains and betrayal, now spoken like a vow.

She could have refused — pride demanded it. But the edges of her vision were already darkening, the world tilting. “You’re a fool,” she breathed.

“Then let me be one.”

He reached for her hand. His skin was cold; hers burned. The instant their palms met, the bond flared — not the gentle pulse of routine synchrony, but a surge of raw, elemental force. Light burst between their joined hands, flooding the ruin in a molten glow.

She gasped — not from pain, but from the intimacy of it. The current of prana coursed through her veins, threading through the fractures in her core. It carried his heartbeat, his exhaustion, his fear, his hope. Every fragment of his will poured into her.

“Ritsuka—” Her voice trembled, the name unfamiliar on her tongue. “You’ll burn out.”

“Keep… going,” he forced out, jaw tight. “We both will if you stop now.”

 

The light flared, then settled. For an instant, her reflection shimmered in his eyes — not the Avenger, not the monster of flame and hatred, but the girl beneath it all, weary and human. The current eased, leaving behind a warmth that was almost unbearable in its gentleness.

When he finally released her hand, his breathing was ragged, skin pallid.

“Idiot,” she whispered, but there was little venom in it. “You nearly killed yourself.”

“Occupational hazard,” he said, managing a thin smile. The faint outline of the crest on his hand almost becoming one with the shadow of the ruin.

"Do you even have the slightest idea of what would have happened if you overstretched your reserves!?" She musters a bit more strength to underline her point

He decided to ignore her question and instead limp to the nearest brazier, gathering scattered fragments of old wooden furniture to feed it. The blue fire leapt to life again, painting them both in ghostlight. Their shadows stretched long — hers armored and jagged, his smaller, flickering.

 

“Why?” she asked suddenly. “You could’ve left me. Went to the nearest Layline to rayshift...”

“You were here,” he said, as though that explained everything.

“That’s not an answer.”

“It’s the only one I’ve got.”

 

“Ritsuka,” she said again at last. The name still felt strange to hear from her. “Do you ever fear the people you summon?”

He shook his head. “I trust them. Even when they don’t trust themselves.”

Her lips parted as if to argue — then closed again. The fire popped. The silence between them deepened into something delicate.

He sat beside her, close enough to the Flame for the warmth to reach them both. The silence stretched between them, not hostile now, but heavy with things unsaid. He rummaged through his satchel and took out the ration bar he originaly intended to to give to the kids at the nursery, snapping it in two.

She stared at the half he placed beside her. “How often do i have to remind you that servants don't need to eat?”

“What is the biggest number you can count to?” he asked with an sarcastic, yet weak smile. “Come on, I like to share. Besides, It keeps people alive.”

“Alive,” she repeated softly, as if testing the word.

After a moment, she picked up the bar. The first bite tasted of faint fruit and dry oatmeal, but there was comfort in the act. In another life, she might have called it communion.

 

She stared at him, then at the half eaten bar. The faintest trace of amusement flickered across her face. “You’re insufferable.”

“I get that a lot.”

The tone of her voice was stiff, but real. She ate in silence after that snarky remark, eyes fixed on the flames.

The quiet stretched again, but now it felt different — less like distance, more like fragile peace.

At some point, the fire burned low. Ritsuka stirred it with a piece of wood, coaxing another faint bloom of light. Jeanne watched him, her gaze softened by the dimness.

“You’ll catch cold,” she said suddenly. It came out more defensive than caring.

He glanced over his shoulder. “And you won’t?”

She looked away. “I’m not… Human.”

“No,” he said softly. “But you are tired.”

Something in his tone — that gentle certainty — made her chest tighten. She drew in a slow breath, let it out. “You are strange, Fujimaru.”

“I’ve heard worse.”

“Most people look at me and see a weapon. Or a mistake.” She hesitated, eyes fixed on the flickering embers. “You look at me like I’m… something else.”

He looked her in the eyes, some look of confusion must have shown since she made a face. "Well, I look at you like you’re human,” he said. "But I think you would be very surprised if you talked to people more..."

Her own look changed to one of confusion "And what do you mean by that exactly?"

"Well... just that every time we've came across each other in Chaldea, it was either during briefings, Rayshift preparations, or at nighttime" He looked at her amber eyes. "What i'm trying to tell you is that most people at Chaldea don't see you that way, you just haven't convinced yourself of that fact yet."

She didn’t respond for a long time. Then, almost imperceptibly, she said, “That’s cruel.”

He frowned slightly. “Why?”

“Because I want to believe you.”

The words were so quiet he almost missed them. He didn’t answer — not with words. Instead, he reached out and gently placed another piece of wood into the brazier. The flame caught again, brightening, casting them both in renewed warmth.

For a while, they just watched it burn.

 

The words landed deeper than she wanted to admit. She turned her gaze to the ruined altar — where once prayers had been answered, now only silence remained. “It’s been a long time,” she said quietly, “since anyone stayed.”

He didn’t answer again, just leaned back against the stone. After a while, his breathing slowed, his head drooping into an uneasy rest. She watched him with her amber eyes — Her blood smudges on his hands, the faint tremor in his fingers from the mana drain. So human. So breakable.

And yet, he had stayed.

Through battle, through pain, through her walls of fire and pride — he had stayed.

The hours bled away. Dawn crept across the horizon, a thin blade of light slicing through the temple’s broken dome. It touched his face first, then hers, softening the harshness in both.

She shifted, her body lighter now, her core steady. The wound still ached, but she could feel the difference — his prana thrumming within her, a heartbeat beneath her own.

 

“Master,” she said.

He stirred, blinking at the light. “Morning already?”

“Seems so.” Her voice was quieter, stripped of its usual edge. “You should rest a little longer.”

He shook his head faintly. “Nah.. i'm good.”

This time, her lips curved — not in mockery, but in something small and unguarded. “good, than that makes two of us.”

 

A faint pulse of magical energy rippled in the distance — their retrieval signal. Their reprieve was ending. Soon the mission would resume, the world demanding their return to the seamless endless war of spirits and shadows.

But for now, there was only this: the warmth between them, the lingering glow of the brazier, the fragile peace of dawn.

She looked at him — truly looked — and the bitterness she carried like a shield began, for the first time, to crack.

“Thank you,” she whispered.

He didn’t speak. He didn’t need to.

As the first full ray of sunlight pierced the heart of the ruin, the blue flame in the brazier shifted — from cold azure to a living gold. A spark of warmth, stubborn and defiant, that refused to die.

 

Notes:

Hope you liked it.

I tried to capture the more Prideful side of Jalter in this fic.
Feel free to let me know if you found it enjoyable!

As always, thanks for reading <3

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