Honkai Star: Rail x Reader Oneshots

No One is Alone | Astral Express Trio x Reader

Summary: Life aboard the Astral Express isn't just about fighting enemies or exploring new worlds—it's also about looking out for each other. As the team's older sibling figure, you take it upon yourself to reprimand Dan Heng and Stelle after they return from a mission injured. Through scolding, comforting, and heartfelt conversations, you remind them that they're part of a team and don't have to face their struggles alone.

Tags: Astral Express Trio x Reader, Platonic, Found Family, Hurt/Comfort, Sibling Dynamics, GN!Reader, Protective!Reader, Team Bonding, Angst with a Happy Ending.

Warnings: Mentions of injuries (non-graphic), Mild guilt/self-blame themes, Emotional vulnerability and introspection.

The hum of the Astral Express filled the air, a comforting backdrop to life aboard the interstellar train. You sat in the lounge, scanning over a datapad while keeping half an ear tuned to the faint commotion from the infirmary. It was a sound you'd become all too familiar with since joining the crew.

Dan Heng and Stelle—recovering from yet another scrape they shouldn't have gotten into.

The infirmary door swished open, and March peeked out, her expression torn between amusement and sympathy. "They're ready for the scolding..." she chirped.

You sighed, setting your datapad aside. Rising to your feet, you felt the weight of your role—neither a fighter nor a strategist, but the de facto big sibling of this unconventional family.

The scene in the infirmary was almost comical. Stelle sat on one of the cots, a bandage around her upper arm, her usual unbothered expression firmly in place. Dan Heng stood nearby, his arms crossed over his chest, looking stoic despite the gash on his shoulder that hadn't been there when the mission started.

"Care to explain?" you began, arms crossed and gaze level.

"It was just a minor miscalculation." Dan Heng replied calmly.

"A 'minor miscalculation' doesn't leave you bleeding, Dan Heng," you said pointedly, turning to Stelle. "And you—didn't I tell you to call for backup if things went south?"

Stelle gave a sheepish shrug. "I thought we could handle it."

"You thought wrong." You sighed, your tone softening as you crossed the room. Grabbing a chair, you sat between them, your expression gentler now. "I know you're both incredibly capable. But even the best make mistakes. You're part of a team—you don't have to shoulder everything alone."

Dan Heng's gaze flickered to the floor, and Stelle's shoulders slumped slightly.

"You don’t need to push yourself to the point of breaking to prove anything," you added, standing to place a reassuring hand on each of their shoulders. "We're in this together. If something happened to either of you, we’d all feel it. And you’d feel the same if it were March, right?"

Both nodded, though they didn’t meet your gaze.

"Good. Now, promise me you’ll call for help next time."

"Promise." Stelle said, a small smile tugging at her lips. Dan Heng gave a slight nod, his stoic mask cracking just enough for you to catch the faintest hint of guilt.

Later, in the privacy of the archive, you found Dan Heng surrounded by stacks of books. He looked up as you entered, his expression as composed as ever.

"You didn't just come here to read, did you?" you asked, pulling up a chair.

"...No," he admitted after a moment, his voice quiet. "I thought I could avoid putting others at risk by keeping things to myself. I didn’t think about how that might affect the team."

You smiled softly, resting a hand on his. "Dan Heng, you're not a burden. You're not just running from your past anymore—you’re building a future with all of us. And we need you to trust us enough to let us help."

He hesitated, then gave a small nod. "I'll try."

Later that evening, Stelle found you in the lounge, sitting with a warm drink. She plopped down beside you, her usual confidence dimmed by something you couldn’t quite place.

"You were right," she said, uncharacteristically subdued.

"About what?" you asked, setting your drink down.

"About asking for help." She stared at the floor for a moment before meeting your eyes. "I’m used to going it alone. But... it’s different with you guys. It’s like, I know you’ve got my back, and that’s scary because now I care. You know?"

You smiled, ruffling her hair like a younger sibling. "That’s not a bad thing, Stelle. Caring means you’re not just surviving anymore—you’re living."

She leaned into your side, her head on your shoulder. "Thanks, big sibling."

"Anytime," you said, wrapping an arm around her. "Just stop scaring me with the near-death experiences, okay?"

"I’ll try." she mumbled, and for now, that was enough.