Honkai Star: Rail x Reader Oneshots

"You've Got a Friend" | Aventurine x Reader

Summary: When IPC’s gambling prodigy, Aventurine, meets a surprising new friend—[Name], a feisty grandma with Madea-like energy and a knack for stirring up trouble—his life takes an unexpected turn.

Tags: Platonic, Aventurine & Grandma Reader, found family, humor, tough love, loyalty, protective reader, unconventional friendship, hurt/comfort, lighthearted moments, character growth, emotional support, Reader is implied female(she/her) but nothing in details, Reader refers Aventurine with nicknames.

Warnings: Mild language, references to emotional scars, some themes of loneliness

Aventurine knew he’d seen his share of unpredictable people, but nothing could have prepared him for you.

He'd met you by accident—a rumor had surfaced of an unusual figure wreaking havoc at a nearby IPC office, and he thought he'd investigate, assuming it was just another rowdy client. When he arrived, however, he found the office staff staring in shock as you, in all your “grandma” glory, stood there lecturing a young agent on the importance of family values, all while waving around your purse like a weapon.

“Now, let me tell you something, sugar,” you declared, your tone sweet but deadly serious. “When a boy like my grandson comes to your office, he’s here for business, not to be messed with. You play nice, and so will I. Got it?”

You didn’t notice Aventurine standing there at first, taking in the scene with a mix of curiosity and amusement. Finally, you turned, catching his gaze, your eyes narrowing slightly as you assessed him.

“Well, look at you, Mr. Fancy Pants,” you said, giving him a once-over. “What’s a youngin’ like you doing workin’ for the government, hmm? Ain't no good come from trustin' those suits. Just you remember that.”

The other employees in the office looked around nervously, but Aventurine only chuckled. “You must be…[Name]?” he asked, quirking an eyebrow.

“Grandma [Name] to you,” you replied, adding a pointed finger jab in his direction. “But you can call me Madea.”

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The friendship that blossomed between you and Aventurine was…unusual, to say the least. You quickly took a liking to him, although you never hesitated to remind him you didn't trust “no government types.” You even went as far as calling the IPC “that mess of bureaucratic backstabbers” whenever Aventurine would bring up his job. Yet, despite the tough talk, you always had a glint in your eye whenever he’d visit, bringing you little trinkets he’d won in his latest gambling scheme or updates on his work.

One day, you caught him staring off into the distance, his confident smile faded just slightly, his guard down for just a moment. Without warning, you gave him a light smack on the back of his head, making him jump.

“What was that for?” he asked, rubbing his head and glaring at you.

“Stop lookin' like a kicked puppy. You’re handsome, got a job, a snazzy suit, and them fancy-lookin’ eyes. Life ain’t all bad, honey,” you said with a smirk.

“Since when do you hand out compliments?” he asked, a hint of a genuine smile appearing.

“Since I realized you ain’t got nobody who does it for ya,” you replied, shrugging. “You work so hard, pullin’ strings, playin’ games, but who’s there for you when things go south?”

That got him. He paused, then looked away. “Life is a game, Madea,” he said softly. “You can only rely on yourself.”

“Well, that’s a load of nonsense if I ever heard it,” you said, crossing your arms. “You got me, sugar. You just don’t know it yet.”

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One evening, while the two of you were hanging out (at his request—though he’d never admit it), Aventurine made the mistake of mentioning that he had a meeting with some shady IPC officials that he didn’t quite trust.

“Now, what kinda mess you gettin’ yourself into, huh?” you asked, eyeing him suspiciously.

“It’s business,” he said, waving his hand dismissively. “Nothing I can’t handle.”

“Oh, I don’t like that look you’re givin’ me,” you said, wagging a finger. “Now listen here, if any of them suit-wearin' snakes give you trouble, you come straight to me, you hear?”

He laughed, holding his hands up. “I think I can handle myself just fine. Besides, it’s not like you’d be able to get into an IPC boardroom in the first place.”

You shot him a wicked grin. “Is that a challenge, honey?”

And sure enough, when Aventurine arrived at his meeting the next day, he was shocked to see you already inside the room. You were sitting there, looking comfortable and casual, surrounded by people in stiff business attire, a sly smirk on your face as you glanced up at him.

“Hey there, sugar! Fancy seein’ you here!” you called out, loud enough to startle the room.

The officials looked between the two of you, clearly baffled. Aventurine, unable to suppress his laughter, leaned in and whispered, “You know, you’re absolutely insane.”

“Only insane thing is lettin’ you walk in here without backup. They don’t scare me,” you whispered back with a grin, “but they should be scared of me.”

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Over time, you became a fixture in Aventurine's life, always popping up when he least expected it, giving him advice he didn’t think he needed, and occasionally pulling a prank or two on his IPC coworkers just to keep things interesting. And though Aventurine kept his usual, unbothered demeanor, he couldn’t deny it—having you around felt like having someone who actually cared.

One evening, after a particularly long day, you set down a plate of warm, homemade cookies in front of him. “A little somethin’ to lift your spirits, sugar.” you said.

Aventurine stared at the plate, then back at you. “I don’t…know what to say.”

“You don’t gotta say nothin’. Just eat. And remember—family ain’t about blood. Sometimes, it’s about who’s there to smack you upside the head when you’re actin’ a fool.”

A genuine smile broke through Aventurine’s usual smirk, and he picked up a cookie, savoring it. For once, he let himself believe that maybe, just maybe, he didn’t have to play the game alone.