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ddawn111 · 7 months ago

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A New (And Improved?) Weapon

ROTTMNT Donatello x Reader

I just love to think that Donnie would go all out when fixing or upgrading things for reader. Total showoff mode.

Also, I’ll admit I might have gotten carried away with the schematics a little, so the chapter is pretty long. I got excited.

The lair buzzed with its usual controlled chaos, but your mind was locked on the new weapon in your hands, a mystic staff you’d claimed after Donatello so graciously (stubbornly) declined it. The concept of wielding such a powerful artifact was exciting, but the reality? Far more complicated.

Surprisingly, the weird looking staff with a small scythe blade on one end and a mace on the other was a shapeshifting weapon. The staff never changes, but different weapons or weapon attachments can materialize off of the ends.

Every time you thought you had a handle on its abilities, it would surprise you with some new twist, like a blade materializing randomly or the entire thing transforming into a flail mid-spin.

You stood in the middle of the lair, staring at the mystic staff in your hands. The smooth, wooden surface pulsed faintly with energy, the ends glowing intermittently as if mocking your lack of control. No matter how much you tried, the thing just wouldn’t cooperate. It felt alive, almost sentient, and you weren’t sure if it wanted to help or hurt you.

“Great,” you muttered, tossing it onto the couch beside you. “I’m going to accidentally vaporize someone at this rate.”

The staff rolled slightly, stopping just before it fell to the floor, and you sighed. You needed help, but the only person who could actually make sense of it was currently holed up in his lab, probably creating something absurdly genius and unnecessarily complicated.

Donatello.

Just the thought of him made your heart do that annoying flutter thing you’d been trying to ignore for years. Ever since you’d met him, his quick wit and confidence had a way of getting under your skin in the best (and most infuriating) way. Not to mention his ridiculous ability to make the simplest things sound like a declaration of brilliance.

You glanced back at the staff, biting your lip. Taking this to Donnie meant subjecting yourself to his relentless sarcasm and that infuriatingly smug smile. But it also meant spending time with him - alone.

For a moment, you debated leaving it be, but the idea of another accidental self-inflicted injury won out. You grabbed the staff and made your way to the lab, rehearsing what you’d say to avoid sounding like a complete idiot.

Frustrated but determined, you made your way to Donnie’s lab.

Donnie’s lab was exactly how you expected it—organized chaos. Tools, gadgets, and half-finished inventions were strewn across the room, glowing softly under the overhead lights. At the center of it all was Donatello, hunched over his workbench, his back to you as he worked on something at his bench. Sparks flying as he welded something you couldn’t identify, the sound sharp but rhythmic. Naturally, he didn’t notice you.

You hesitated for a moment, leaning on the doorway and watching him work. He always looked so… focused. Determined. It was one of the things you admired most about him, even if you’d never admit it out loud.

“Don,” you called, stepping closer. He didn’t respond.

“Donnie.”

Nothing.

“DON. Hey! Donnie boy!” Still nothing.

You sighed and leaned against his desk chair, twirling the staff in your hands. “Donatello!” you tried again, drawing out the name for emphasis. Still nothing. You rolled your eyes, flopping down sideways onto his desk chair with all the grace of a cat on a lazy day. “DonTron!”

Finally, the welding stopped for a beat, but it wasn’t until you called, “Mr. Genius!” with feigned exasperation that he finally turned around.

“I hear someone acknowledging my proper title,” he said smoothly, a small grin tugging at his lips as he lifted his welding mask and rubbed his forehead, finally making eye contact.

You burst out laughing. “Really? That’s the one you respond to? I’ve been calling you for, like, five minutes.”

“But of course, sweet maiden,” he replied with a theatrical bow. “I only respond to the sweet, sweet truth.”

You snorted, shaking your head. You tried not to let your face heat up at the “sweet maiden” comment, instead crossing your arms with a smirk. “You’re ridiculous.”

“Ridiculously accurate.”

“Sure, sure.” You straightened and held up the staff. “Anyway, I have a formal request.”

“With what, exactly?” he asked, his tone casual but his gaze sharp. He leaned back against his desk, crossing his arms in a way that made him look far too confident.

You resisted the urge to look away and held out the staff. “This thing’s… complicated. I still don’t know what half of it does, and I’d rather not find out the hard way, sooo... Think you can analyze it and share your genius knowledge?”

Donnie’s lips twitched into a smirk. “Oh, so now you’re coming to me for help? And here I thought you were Miss Independent.”

“Don’t push it, DonTron,” you shot back, though the nickname made him grin even wider.

You batted your eyes at him for extra effect, and Donnie sighed, shaking his head with a smirk. He took the staff from you, his fingers brushing yours for the briefest moment. You pretended not to notice the way your stomach flipped at the contact. “Well, since it’s a formal request,” he said, examining the weapon with a critical eye. “I suppose I can spare a moment. For you.”

“Thanks, Don-tron. You’re the best.”

“Obviously,” he said, taking the staff and walking off with it, already muttering calculations under his breath.

You lingered for a moment before leaving, wondering why it was so easy for him to fluster you without even trying.

When you returned to the lab a few days later, it was with equal parts excitement and dread. The lair buzzed as usual, but your mind was elsewhere; on the mystic staff you’d claimed and the guy who was currently tweaking it. It had taken every ounce of courage you had to hand it over to Donatello without fumbling over your words.

You’d been thinking about Donnie’s upgrades ever since you handed over the staff, but mostly, you’d been thinking about him. Every smirk, every comment, every fleeting moment spent in his orbit replayed in your mind with maddening clarity.

You’d been crushing on him for… well, longer than you cared to admit. Of course, it didn’t help that he was infuriatingly brilliant and confident in ways that left you simultaneously exasperated and weak in the knees. Still, you weren’t about to let that show. Not to him, anyway.

And now, here you were again, standing at the entrance to his lab with your heart doing somersaults.

Donnie turned as you approached, holding the staff in one hand like it was a trophy. He looked far too pleased with himself.

“Ah, my esteemed client returns,” he said, his grin widening as you stepped closer. “Prepare to be amazed.”

“Already prepared,” you quipped, crossing your arms to keep from fidgeting. “Let’s see what you’ve got, Mr. Genius.”

“Behold! your newly enhanced mystic weapon,” He handed you the staff with a flourish, and you immediately noticed it felt lighter and sleeker…and…metal? The surface was smooth and silver, with faint etchings that glowed when you touched it. It hummed softly in your hands, almost as if it were waiting for your command.

“Uh, Don, this looks… different.”

“Different?” he repeated, mock offense lacing his tone. “Try better. I’ve optimized it in every way imaginable. Allow me to demonstrate,” Donnie said straightening up.

“What exactly did you do to it?” you asked, trying to ignore the way your pulse quickened whenever he looked at you like that, like he knew something you didn’t.

“Behold!” Donnie gestured dramatically as he launched into a rapid-fire explanation. “The staff now splits down the middle for dual-wielding combat. Blades can eject from the ends for melee attacks in case the mystic properties fail you—which, let’s be honest, they might.

And this!” He reached over, pressing a subtle button near the middle of the staff. With a soft whir, the entire weapon collapsed down to the size of a drumstick. “Collapsible design for maximum portability. You’re welcome.”

Your eyebrows shot up. “Okay, that’s… actually pretty awesome.”

“Oh, we’re just getting started,” Donnie said, clearly relishing the moment. He pressed the button again, and the staff extended back to full length with a satisfying snap. “The exterior is reinforced with an alloy of my own design, making it nearly indestructible, and the mystic energy is now perfectly stabilized, so no more misfiring while you wield it. But wait - there’s more!”

You couldn’t help but smile as he tapped another button near the base of the staff. Instantly, small engines popped out of the back end, sleek and perfectly integrated into the design.

“Boom! Jet engines”

“Wait, jet engines? Are you serious? They’re so tiny,” you gawked, twirling the staff experimentally. It felt perfectly balanced, the mystic energy now harmonizing with Donnie’s tech.

“Silent jet engines, and yeah I’m awesome, I know,” he corrected, his grin widening, gesturing like a game show host revealing a prize. “They allow for broom-style flight. The controls are balance based, the speed and steering are controlled by your movement, so it’ll take some getting used to.”

“Wait, so you’re saying I can fly with this?” you asked, your voice tinged with disbelief.

“Precisely,” he said, nodding as if it were the most obvious thing in the world. “I noticed you struggle with keeping pace during missions, so this should level the playing field.”

“Gee, thanks for reminding me,” you said dryly, though your heart warmed at the thoughtfulness behind the upgrade.

Donnie chuckled, but there was something softer in his gaze when he replied. “I just wanted to make sure you could keep pace with us,” he said, his voice quieter but no less confident. “Can’t have you falling behind.”

You stared at him, equal parts impressed and suspicious. “And you’re sure this is still mystic? It kind of feels like you rebuilt the whole thing from scratch.”

He waved a hand dismissively. “Never question the tech man. Just enjoy the masterpiece.”

Shaking your head, you gave the staff another experimental twirl. It felt incredible in your hands, sleek, powerful, and undeniably you. The mystic energy now perfectly synchronized with Donnie’s tech. You had to admit - it was pretty awesome. “Fine, I’ll bite. What else did you add?”

Donnie smirked, tapping a finger to your temple. “That, my dear, is for you to discover.”

You tilted the staff in your hands with a smile, testing its weight. It felt perfect, like it was made just for you. “This is amazing, Don. Really. You outdid yourself,” you said in a soft voice.

“Obviously,” he quipped, though there was a faint blush creeping up his neck. He turned away quickly, pretending to fiddle with his tools.

You smiled to yourself, watching as he worked. For all his bravado, there was something undeniably endearing about moments like this, when his confidence wavered just enough to show the person underneath.

“Well,” you said, leaning the staff against your shoulder, “I guess this means I owe you one.”

Donnie glanced over his shoulder, his smirk returning full force. “Oh, you owe me several.”

Before leaving, you couldn’t resist poking around his gadget cabinet, no visit to Donnie’s lab would be complete without poking through his latest inventions. Your eyes landed on a long, sleek metal earring that stretches up from the earlobe and hooks over the helix, the design too intriguing to pass up, and you couldn’t resist trying it on.

“What’s this do?” you asked, holding it up.

Donnie looked up from his work, a frown already forming. “That’s not finished yet.”

You grinned, fixing it onto your ear. “Which means it’s fair game.”

Feeling at the metal, the moment you swiped your finger upwards from the bottom of the earring to the top, pink holographic glasses materialized over your eyes, showing holographic statistics of everything around you. “Whoa.” You waved a hand in front of your face, and the display followed your movements, like an augmented reality interface. “This is so cool.”

“Careful!” Donnie rushed over, his hand brushing yours as he adjusted the earring. “That’s still in beta.” You tilt your head to give him access to your ear and smile.

The brief contact sent a jolt through you, and for a second, neither of you moved. Then Donnie cleared his throat and stepped back, his expression unreadable.

“It’s mine now,” you teased, feeling around until you realized swiping your finger up or down the earring adjusted the transparency of the holograms clouding your vision, which, in tandem, adjusted the transparency of the glasses so your eyes were more visible as you dimmed the holograms. “I’ll take my chances. Don’t worry, I’m just ganna borrow it… indefinitely.”

“Fine,” he muttered. “But if it malfunctions, don’t blame me.”

You also snagged a pair of fingerless gloves that, when activated, transformed into sleek gauntlets. They felt light but sturdy, and you could already imagine how useful they’d be in a fight.

“Those too?” Donnie asked, trying to look irritated, but smiling watching as you flexed your fingers in the gloves.

“Hey, if you didn’t want me to take them, you shouldn’t leave them lying around,” you teased.

He rolled his eyes but didn’t argue. Of course, you’d find out later that all your gadgets included Donnie’s hardware, giving him way too much control when he wanted to mess with you. (Cue the time he reversed your gauntlets mid-battle just to prove a point.)

You twirled your newly enhanced staff and glanced over at Donnie, who was already engrossed in another project. “Thanks, DonTron. You’re a lifesaver.”

“Don’t mention it,” he said without looking up, then added with a smirk, “Seriously, don’t mention it. I have a reputation to maintain.”

“Your secret’s safe with me, Mr. Genius.”

As you left the lab, staff in hand, gloves fitted to your hands, and earring firmly in place, you couldn’t help but replay the interaction in your mind. The way he’d smiled, the way his voice softened when he talked about making sure you could keep up, it all felt… different.

Maybe he cared more than he let on. Or maybe you were just imagining things. Either way, you weren’t about to let this crush win. Not yet, anyway.

But as you glanced back, you caught Donnie watching you leave, his expression softening for just a moment before he turned back to his work.

As you filtered out of the lab Donnie chuckled to himself thinking of how you didn’t realize your “stolen tech” was a perfect fit.

Thanks for reading! I'm so happy to finally post my first fic. Sorry for any typos.

I was thinking about expanding on this with a oneshot series, let me know your thoughts.

Feel free to request.

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