The Hero Beneath The Waves

Ok I’m dying to know what you think, if somehow law got to meet a superhero reader (idk like Ironman or Spider-Man kind of inspired superhero) from like, marvel universe that fell near his submarine, would he be amazed they are like sora the sea warrior? (I know very little about sora and why law likes him so much other than he like captain America but in one piece? Do we even know if sora has a rank in the marines??) would he think they cool with their cool super suit or strong morals?! Or would he only think sora is cool? (Seriously willing to get into an argument with law on whose cooler, sora or Ironman)

The Hero Beneath the Waves

Law × gn!Reader

a/n: I truly love nerdy Law sakjie so glad I could write this lmao

words count: 2.6k

tags: first meeting, superhero reader, humor, action, marvel-inspired

masterlist || ao3 || ko-fi

BANG! SPLASH!

A massive object crashes into the sea, sending waves slamming against the Polar Tang. The submarine rocks violently. The crew shouts in alarm.

“What the hell was that?!” Shachi yells, gripping a railing.

Law strides toward the monitor “Scan the area.”

The sonar pings rapidly. Penguin squints at the screen “Uh… Captain? There’s a person down there.”

“A person?” Law frowns.

Ikkaku zooms in with the external camera. A metallic figure floats in the water, faintly glowing. The person inside stirs.

“…They’re alive.” Bepo confirms.

Law sighs “Bring them in.”

Inside the Polar Tang, the unconscious figure lies on a stretcher. Their armor is sleek, futuristic, advanced tech. The faceplate slides open with a hiss, revealing you, blinking dazedly.

“…Ugh. That was not a smooth landing.” you mutter. Your eyes dart around “A submarine? Who—?”

You see Law “Oh. You look important. What’s with the hat?”

Law scowls “Who the hell are you?”

You smirk “Call me Iron Phantom.” You flex your fingers, testing your mobility “Mind if I sit up? Not really a fan of lying down in strange places.”

Law crosses his arms “That depends. Are you a threat?”

You chuckle “That depends... Do you consider saving people a threat?”

Law tenses. That kind of line… It’s too familiar.

Bepo, intrigued, leans closer “You’re a hero?”

You grin and give a two-fingered salute “At your service.”

There’s a heavy silence. The crew exchanges glances.

Law exhales sharply “Tch. You sound like someone... nevermind.”

You raise an eyebrow and Law’s eye twitches.

Shachi whispers “Captain’s thinking of Sora…”

Penguin nods “Definitely Sora.”

You tilt your head “Who’s Sora?”

Law scoffs “Just some fictional warrior of the sea.”

You smirk “So… a hero?”

Law glares.

Shachi nudges Penguin “He totally thinks they’re cool.”

Law growls “Shut up.”

You chuckle “I am pretty cool.”

Law pinches the bridge of his nose. This is going to be a long day.

The crew is staring at you. You take the opportunity to sit up, rolling your shoulders.

“Okay,” you say “I’ve woken up in worse places.”

Law narrows his eyes “Where did you come from?”

“Technically? The sky. More specifically? Got hit mid-flight, lost control, and, well…” You gesture vaguely “Gravity, I guess?”

Shachi gasps “That’s kinda badass.”

Law shoots him a glare. Shachi clears his throat and looks away.

You tilt your head at the submarine’s interior “This your ship?”

“Submarine” Law corrects.

You grin “A submarine? That’s sick. Not enough heroes operate underwater, you know. It’s all ‘soaring through the sky’ or ‘running at the speed of sound.’ But the ocean?” You nod approvingly “Respect.”

The crew looks between you and Law.

Penguin whispers “Captain is so weak to hero talk.”

Law ignores him “How does your suit work?”

You glance down at your armor “Oh, it’s powered by an advanced energy core. Flight, enhanced strength, force fields, the usual.”

“…Tch.” Law clicks his tongue, crossing his arms “A walking weapon.”

You smirk “A walking hero.”

The twitch in Law’s eye is noticeable.

Bepo, still curious, leans in “Why do you save people?”

You blink “Uh. Because it’s the right thing to—” you stop and gasps as soon as you focus on Bepo "Oh wow, you're so cuteeeee"

Shachi and Penguin grin at Law.

He exhales sharply “The right thing to do... Of course that’s the answer.”

You raise an eyebrow “Something wrong with that?”

Law rubs his temples “Nothing. It’s just...” He gestures vaguely at you “You sound exactly like...”

“Sora?” the crew chimes in.

Law glares “Shut up.”

You laugh “Oh, so I do remind you of someone.”

Law scowls “Not a compliment.”

“I dunno,” you tease “Sounds like a compliment from you.”

Law turns to his crew "Get them off my ship.”

“Aw, come on, Captain,” Penguin says “They’re kinda cool.”

Law’s eye twitches “We are not keeping a superhero.”

You smirk “You say that like I’m a pet.”

Shachi snickers “Captain’s just mad you’re like his childhood idol.”

You lean toward Law, grinning “You a fan of heroes, Captain?”

Law gives you the most unimpressed look possible “No.”

You nod sagely “Denial. The first stage.”

Law sighs. This is going to be an even longer day than he thought.

Law wants you off his submarine.

Your problem is that you got kinda injured from that fall.

Nothing life-threatening, but the moment you try to stand, your body wobbles like a newborn deer. The suit took the worst of the damage, but the impact rattled your brain enough to make the world spin.

“Great,” Law mutters “A half-broken superhero.”

You shoot him a weak grin “I prefer ‘slightly dented.’”

Bepo catches you before you tip over completely “Captain, we should let them rest.”

“No,” Law says “They’ll be fine.”

You blink “You must a doctor here, right?”

Bepo ears start to move “Captain is our doctor”

Law crosses his arms “So?”

“So, you’re supposed to help people when they need a doctor” you point out.

The crew watches, completely fascinated as their Captain is forced to process being out-moraled on his own ship.

Law pinches the bridge of his nose “I don’t treat reckless idiots.”

You smirk “Bet you’d treat that Sora.”

Silence.

Shachi and Penguin choke trying not to laugh.

Law inhales slowly through his nose “Fine.”

Later on, Law works efficiently, scanning for injuries while you sit on the examination table, feet swinging.

“You ever met a superhero before?” you ask.

“No.”

“You excited?”

“No.”

You grin “You sound excited.”

Law glares “I could throw you back into the ocean.”

“Wouldn’t be the first time I got thrown out of somewhere.”

Law ignores you, eyes flicking to your suit’s exposed wiring “Your armor needs repairs.”

You sigh “Yeah, I don't know how to do it myself. I usually have a team for that. But seeing as I’m currently stranded on a submarine…”

Bepo perks up “Ikkaku’s good with machines!”

Ikkaku grins “I’d love to take a look at it.”

You brighten “See? Your crew likes me.”

Law doesn’t even glance up “My crew is full of idiots.”

Shachi grins “Idiots who think superheroes are cool.”

Law clenches his jaw.

You lean back, watching him “You ever wanted to be a hero?”

“No.”

“Not even as a kid?”

“No.”

You smirk “Liar.”

Law swears under his breath. This is officially his worst patient ever.

You’ve been on the Polar Tang for a grand total of three hours now, and you’re already Law’s biggest headache.

Not because you’re demanding. You actually sit still while he patches you up, which is more than he can say for his own crew.

No, the problem is that you’re clearly a walking Sora reference, and the crew will not shut up about it.

Law applies a bandage to your arm, muttering, “You heal fast.”

You grin “Perks of the suit. It boosts recovery.”

“Ridiculous,” he scoffs, but he doesn’t look away from your gear. He’s analyzing every detail, the material, the tech, the way it integrates with your body.

You catch him staring “You’re interested.”

“No.”

“You’re totally interested.”

“I’m analyzing flaws.”

“Oh? Find any?”

Law tugs the bandage a little tighter.

You hiss “Ow! That was petty.”

“No, that was medical precision.”

Shachi leans against the wall, grinning “Captain’s totally geeking out.”

Law glares “I do not ‘geek out.’”

Penguin nudges him “Then why’d you grab a notebook?”

Everyone looks.

Sure enough, Law’s holding his personal notebook, the one he uses for medical observations, or in this case, detailed notes on your suit’s tech.

He immediately closes it “You all need to shut up.”

You laugh “Busted.”

Bepo tilts his head “Captain, if you’re curious, why not just ask them?”

Law crosses his arms “I’m not curious.”

You smirk “If I told you how my flight system works, you wouldn’t be interested?”

“…No.”

“Not even if I explained the physics behind it?”

Silence.

Shachi grins “He wants to know.”

Law drags a hand down his face “I swear to—”

You stretch lazily “Well, I guess I won’t explain, then. Too bad.”

Law’s eye twitches. You can practically hear his inner self screaming for answers.

“…Tch.” He exhales sharply “Fine. How does it work?”

The crew erupts in laughter.

You grin “See? That wasn’t so hard.”

Law already regrets this conversation.

You swing your legs from the medical table, grinning like you just won a bet.

“I knew you were interested” you say.

Law rolls his eyes “It’s scientific curiosity, not admiration.”

You raise an eyebrow “Uh-huh. And if I asked you how your submarine works, that wouldn’t be admiration either?”

Law scoffs “Of course not.”

“You saying there’s a difference between admiration and respect?”

Law tenses.

The crew watches.

Penguin whispers “Oh, they got him.”

Law glares “Shut up.”

You smirk “Sooo, you respect my tech?”

“…It’s functional” Law admits, very grudgingly.

Shachi grins “That’s the closest thing to a praise that Captain has ever given to a stranger in years.”

Law snaps his notebook shut “I hate all of you.”

You chuckle “It’s fine, I get it. You’re a grumpy, cynical doctor who doesn’t believe in heroes—”

“I don’t.”

“—but deep down, you definitely wanted to be one as a kid.”

Law inhales sharply through his nose.

Silence.

You smirk “Called it.”

Shachi and Penguin high-five in the background.

Law grits his teeth “I am a pirate captain and a doctor, not a hero.”

“Sure, sure,” you say “And that Sora is just a propaganda story.”

“…Tch.”

You hop off the medical table, rolling your shoulder “Welp, I feel way better. Thanks, Doc.”

Law mutters “Unfortunately.”

You glance at the crew “So, when’s dinner? I’m starving.”

Ikkaku grins “I’ll make extra.”

Law glares “They are not staying.”

You smile “C’mon, Captain. You wouldn’t kick an injured guest out, would you?”

Law exhales slowly, pinching the bridge of his nose.

This is officially his problem now.

Right as you were all sitting down for dinner, the Polar Tang shakes as explosions erupt outside.

“Captain!” Ikkaku yells from the control room “Enemy ship approaching, they're bounty hunters!”

Law grits his teeth “Of course it’s bounty hunters.”

You glance at him “Want me to handle it?”

“No.”

You ignore him and start walking.

“Oi,” he snaps “Did you hear me? I said no.”

You just shoot him a grin “Yeah, but you’re not my Captain... Captain.”

Law swears under his breath.

Outside the Polar Tang a massive bounty hunter ship looms overhead. The crew scrambles, manning the cannons. You step onto the deck and roll your shoulders.

Law follows, grumbling “I don’t know why I even bother.”

Then he watches you activate your suit.

Thrusters ignite at your back, launching you into the air. The ocean wind whips past as you twist midair, dodging cannon fire.

Law stops moving.

His crew doesn’t notice but he does.

His surgeon’s brain starts analyzing instantly.

Your suit doesn’t just grant flight, it adjusts to air resistance, correcting your trajectory with perfect precision. No wasted movement. Every boost of your thrusters is calculated.

"The reaction time...” Law mutters under his breath.

You spin between cannonballs, dodging like it’s nothing. Then you fire back. A pulse blast rips through the enemy’s mast.

Shachi and Penguin shout in awe. Bepo gasps “That’s incredible!”

Law tilts his head, completely fascinated.

Your targeting system, how does it calculate angles so instantly? Is it predictive tech? Some kind of AI support?

You land on the enemy ship with a metallic clang. The bounty hunters charge.

One swings a sword.

Your gauntlet snaps up, catching the blade.

Law’s eyes widen.

The armor absorbs the impact. No recoil. The distribution system must be flawless.

Then, in one fluid motion, you twist the sword away and deck the guy in the face.

The crew is freaking out.

Shachi grabs Penguin’s arm “Captain’s doing the thing.”

Penguin nods “He’s totally doing the thing.”

Law doesn’t even blink.

His gaze flickers from your footwork to your reaction time to the way your suit enhances your natural movements rather than restricting them.

“…They can still maneuver at that speed?” he mutters, barely realizing he’s speaking aloud “That shouldn’t be possible without—”

You dodge a bullet mid-air.

Law inhales sharply.

The bounty hunters rush again. You move like a blur.

You slam one into the ground so fast that Law’s brain lags. Another charges, you sidestep effortlessly, then launch a repulsor blast point-blank into their chest.

Law leans forward slightly.

His crew watches him instead of you now.

Ikkaku whispers, “He’s in full nerd mode.”

Bepo nods solemnly “He’s already started taking mental notes.”

You flip over another opponent, land gracefully, and turn back toward the Polar Tang “That’s the last of ‘em.”

Shachi and Penguin cheer.

Law is staring at your boots.

“That propulsion system...” he mutters, completely absorbed “The shift in weight distribution should’ve thrown off the landing, but—”

You smirk “You like what you see, Captain?”

Law snaps out of it.

His expression hardens instantly “Tch. You’re reckless.”

You laugh “So you said. But I did just save your ass.”

Law clicks his tongue “You’re a pain in mine.”

You step closer “Admit it. You think it was cool.”

Law crosses his arms “I think it’s impractical.”

Penguin grins “That’s what he says when he’s impressed.”

Law turns on his heel and walks away “We’re leaving. Get back on the ship.”

You watch him go, then glance at the crew “He’s totally geeking out, isn’t he?”

Shachi nods “Oh, 100%.”

You chuckle. This is way more fun than you expected.

Dinner on the Polar Tang is surprisingly cozy.

You sit at the long table, surrounded by a crew that definitely doesn’t see you as a stranger anymore. Ikkaku chats excitedly about possible modifications for your suit, while Shachi and Penguin keep pestering you with questions.

“Do you have a secret identity?”

“Do you have a superhero name?”

“Can you shoot lasers from your eyes?”

You laugh “I feel like answering would ruin the mystery.”

Across the table, Law eats in silence.

Or, well... he tries to.

Bepo keeps throwing glances his way.

Shachi and Penguin keep nudging each other.

Everyone is waiting for him to say something.

Finally, after finishing his food, Law sighs and sets his chopsticks down.

“You can stay” he says.

The crew erupts into cheers.