Honkai Star: Rail x Reader Oneshots

"Do you think we are soulmates in every universe?" | Aventurine x Reader

Warnings: Angst(just pure angst), hurt/no comfort, character death, grief, crying(duh-), breakdown, emotional loss, unanswered question, regret, overall definitely sad.

You and Aventurine were tangled together under the soft blankets, the dim glow of the nightlight casting long shadows across the room. His arm was draped lazily over your waist, his head resting on your shoulder as he absentmindedly twirled a strand of your hair between his fingers.

You could feel his breath against your skin, slow and steady, a rhythmic comfort that always seemed to soothe you.

You tilted your head slightly, looking at him-his sandy-blond hair tousled and his vibrant eyes half-closed in contentment. The thin gold rims of his glasses were resting on the nightstand, leaving his face bare and vulnerable in a way he rarely showed the world.

"Aventurine," you whispered, and he hummed in response, eyes flicking up to meet yours. "Do you think we're soulmates in every universe?"

He stiffened slightly beside you, his fingers pausing on your skin. There was a long, heavy silence before he spoke, his voice quiet, almost unsure.

"I... I don't know." You blinked, surprised by the uncertainty in his voice. Aventurine was never unsure of anything.

He always had an answer, always knew the next move. But now, his vibrant eyes were clouded with something you rarely saw in him-doubt.

"I want to believe that," he said finally, his gaze still fixed on the ceiling. "But I've seen too much. I've lost too much. I don't know if fate works like that. If it's kind like that."

You shifted closer to him, your hand reaching up to cup his face, turning him to look at you. "We don't need fate to be kind," you whispered, your thumb brushing against his cheek. "We just need each other."

A small, bittersweet smile tugged at the corner of his lips. He leaned into your touch, closing his eyes for a moment, as if he was trying to hold onto this-onto you.

"Maybe," he murmured, his voice barely audible. "But what if... what if I lose you? In this universe, or any other?" You didn't have an answer for that.

You didn't know how to reassure him of something you couldn't control. All you could do was hold him tighter, as if that alone could keep you together.

"It's not fair..." his voice whispered, but the warmth of the bed was gone.

Suddenly, everything shifted. The soft comfort of your shared bed dissolved into cold air, the delicate touch of his fingers replaced by the harsh reality of silence.

You weren't in your room anymore. You weren't wrapped up In each other. You weren't... anywhere you wanted to be.

The scene cut harshly to stone-the gravestone cold and unyielding beneath Aventurine's fingertips. The silence of the cemetery was deafening, so different from the quiet comfort you'd shared.

"It's not fair..." he whispered again, kneeling by the headstone. His magenta and cyan eyes, usually so sharp, so alive, were now hollow. His words felt like they were pulled from his chest, ripped out in broken pieces.

"I wanted you in this one." The soft wind rustled his overcoat, the roulette detailing on the back almost mocking the cruel game fate had played on him, before the gravestone, your name etched into the cold, unforgiving stone. The world around him felt distant, muted, as if it didn't matter anymore. And maybe it didn't. Not without you.

His gloved hand rested on the stone, trembling, as if he could still feel you beneath his touch. He could still hear your voice, soft and hopeful-"Do you think we're soulmates in every universe?" It echoed in his mind, relentless, a cruel reminder of the question he'd never truly answered. And now, it was too late.

"I was afraid," he choked out, tears burning behind his eyes. "Afraid of losing you. Afraid that maybe... maybe we weren't meant to be. And now-" His voice broke completely, a sob tearing from his throat as he collapsed to his knees, gripping the stone as if it was the only thing keeping him grounded.

"I lost you too."

For a man who had always gambled, who had always taken risks and come out on top, this was a loss he couldn't bear. It felt like the universe itself had turned against him, taken the one thing that mattered most. He had never felt so powerless, so utterly broken.

"I didn't know," he whispered, his voice cracking, barely holding together. "I didn't know what to say. I didn't know how to believe in something so... good."

"I would've chosen you," he whispered through his tears, his voice raw and aching. "In every universe, I would've chosen you."

But here, now, the only choice left was to mourn. And for the first time in his life, Aventurine had no strategy, no plan. He had nothing but the ache of your absence and the unbearable weight of regret.