Welcome! As the name suggests, this is where I'll be sharing my Honkai Star: Rail x Reader work from my Tumblr (aventurineswife).
I'd love to hear your requests, so feel free to send them in! I hope you enjoy reading!
Warnings: Most of my fics are...
Summary: In an alternative universe, where Kakavasha's sister is still alive; Aventurine introduces his significant other to his sister, a rare and heartfelt moment in a world of high-stakes gambles and risks.
Tags: Aventurine x Reader, Fluff, Sibling Bonding, Aventurine's sister is a Stoneheart like him, Soft Aventurine, Emotional Vulnerability, Found Family Dynamics.
In the dimly lit parlor of a high-end lounge, Aventurine sat beside you, his hand warm in yours. You’d been together long enough to know how well he could hide his feelings, but today, his smile faltered ever so slightly. You gave his hand a reassuring squeeze as the doors opened, and his sister strode in.
She was a vision, sharp and commanding, with the same striking eyes as Aventurine. Her outfit mirrored his style in a way only siblings could achieve, with subtle hints of their shared legacy as Stonehearts woven into every detail. She looked at you, one eyebrow arched, her expression unreadable yet curious.
“This is the person you’re always talking about?” she teased, her voice dripping with a mix of skepticism and warmth.
Aventurine’s cheeks flushed, though he quickly recovered, offering a suave grin. “Guilty as charged,” he replied, winking at you. “You know me — can’t resist a good investment.”
You rolled your eyes playfully, nudging him. "Investment? That’s all I am?”
“Oh, absolutely,” he laughed, pulling you closer. “But one with extraordinary returns.”
His sister chuckled, watching the two of you. “You know, I never thought I’d see him like this. Kakava- I mean, Aventurine here… well, he’s never been one to keep people close. But you,” she paused, a flicker of genuine admiration crossing her face, “you must be something else to have him wrapped around your finger.”
It felt surreal, sharing this moment with Aventurine and his sister, both Stonehearts, bound by family, power, and a deep understanding of risks few dared to take. You noticed the pride in her gaze as she looked at Aventurine, and something unspoken passed between them — years of shared battles, secrets, and a fierce loyalty only siblings could know.
Aventurine reached for his glass, fingers tapping in a steady rhythm — a small sign you’d learned to recognize as his way of holding onto control. “You’re right,” he said, his voice softening. “I’m lucky. I might not say it enough, but… meeting them has been a gamble I’d take again and again.”
His sister gave him a fond smile before turning to you. “Take care of him, alright? He’s a handful, but… he’s worth it.” There was a vulnerability in her eyes, a glimpse of how deeply she cared for him beneath her confident facade.
You took her hand, nodding with a smile. “Always.”
Aventurine’s face softened, his usual playful demeanor replaced by something more genuine, more raw. As the night went on, the three of you shared laughter, stories, and dreams that somehow, for the first time, didn’t feel like mere gambles but promises worth holding onto.
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