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sanjisnumber1hater · 2 months ago

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Sleight of Heart

nami x fem!reader

you flirt with men to manipulate them and get whatever you want from them, so what happens when you meet the strawhats?

a/n: happy pride month, my sapphics ଘ(੭ˊᵕˋ)੭* ੈ✩‧₊

words count: 4.7k

tags: slow burn, thief x thief, post-timeskip, enemies to lovers, clever reader, tension

masterlist || ao3 || ko-fi

The sun burns bright over Asteria, a busy island full of life, music, and secrets. The Strawhat crew walks through the main market street, loud and colorful as always. You see them from a rooftop, leaning over a balcony with a half-eaten apple in your hand.

You already know who they are.

Monkey D. Luffy. Pirate captain. Rubber boy. Big smile. Easy to fool, if he’s distracted.

Roronoa Zoro. Strong. Grumpy. Bad with directions. Not your target.

Nico Robin. Too smart. Too calm. Too risky.

Franky, Usopp, Brook, Chopper… All dangerous in their own ways. At least for what you have in mind.

Vinsmoke Sanji...

Ah, Sanji. Weak for a pretty face.

Bingo!

But the one to truly worry about?

Nami.

You see her now, walking near the back of the group. Arms crossed. Eyes scanning. Calculating. You can almost feel her sharp mind from up here.

She’s just like you.

Too bad.

You jump down from the roof, land silently in a side alley, and slip into the crowd. You wait, moving carefully. You smile when Sanji walks closer.

Now or never.

You step into the open and “accidentally” bump into him.

“Oh! I’m so sorry!” you say in a sweet voice, placing your hand on his chest lightly.

Sanji’s eyes turn into hearts instantly.

“Mon dieu! Are you okay, mademoiselle?” he asks, taking your hand and holding it like it’s made of gold.

You already slipped your fingers into his coat. There’s a bag of beli in there, too easy.

But before your hand can close around it, another hand grabs your wrist.

Strong. Quick.

“Nice try.”

You look up, and there she is. Nami. Amber eyes locked onto yours. She caught you but you don’t flinch.

Instead, you smirk “Took you long enough.”

Her eyebrows twitch “You knew I was watching?”

“I was counting on it.”

You twist your wrist, not to break free, but to slide a small coin into her palm. Her fingers close around it by instinct. She opens them. The coin is fake, cheap metal, painted gold.

Nami looks at it. Then at you.

You’re already gone.

Vanished into the crowd.

Back on the Sunny, Nami stares at the fake coin.

Robin notices “Trouble?”

“Maybe.” Nami slips the coin into her pocket “She’s good.”

Robin smiles “Good enough to fool you?”

Nami doesn’t answer but her lips curl into a tiny, curious smile “Not for long.”

The diner is loud. Full of clinking silverware, sizzling oil, and way too much talking. It smells like grilled fish and spiced rum. The Strawhats sit at a corner table, taking up too much space as usual.

You spot them through the window.

You grin.

They don’t see you yet. Not until you open the door and walk in like you belong there. No disguise, no tricks. Just confidence.

You grab a chair from a nearby table and drag it across the floor. The sound makes Zoro glance over. Luffy pauses mid-bite. Sanji... oh, he lights up the moment he sees you.

You sit down at their table like you’ve been invited “Miss me?”

“Angel!” Sanji gasps, nearly knocking over a glass “What a miracle—did fate bring you back to me so soon?”

You lean your elbow on the table, chin in your hand “Maybe I just like the way you blush.”

He practically melts into his suit.

“You shouldn’t be here” Nami says from across the table, arms crossed.

You don’t look at her.

You keep your eyes on Sanji “Is this the part where someone kicks me out?”

Luffy shrugs “You seem fun. I vote she stays.”

Chopper giggles. Usopp is nervous but interested. Brook’s just happy to have another pretty face at the table.

Zoro says nothing, which probably means he’s watching too closely.

“Can I get you something, mademoiselle?” Sanji asks, already rising from his seat “What do you drink? Wine? Tea? Something sweet like your voice?”

You tilt your head “Surprise me.”

Sanji bows low and rushes off to the counter.

You finally turn to Nami. She hasn’t stopped staring.

“Relax,” you say “I’m not here to rob you… again.”

“Then why are you here?”

You smirk “I like to fool men. Can you blame me?”

She blinks once. Not offended. Not angry.

Intrigued.

“You’re honest” she says slowly.

“Only when it makes people trust me.”

She nods once, almost like approval. But there’s something else under her gaze now... curiosity. Calculation. Maybe even respect.

“You know you won’t get far with Sanji” she says.

“Oh, I know,” you say with a wicked smile “But watch this.”

Sanji comes back with a fancy glass filled with something pink and fruity. A paper umbrella leans on the rim.

“For the goddess at our table” he announces, placing it in front of you.

You take a sip “Delicious. You made it?”

“Of course! I used—”

You interrupt, leaning in “You always treat strangers this nice? Or just the ones with long eyelashes?”

He stutters “N-no! I mean—yes? I mean—uh—it’s not like that!”

You laugh. It’s charming. Loud enough to make a few heads turn.

“Relax. You’re adorable.” you say, tapping his chest lightly.

His eyes go soft “I would die for you.”

You raise an eyebrow “Would you tell me anything I asked?”

“Anything!”

“Even secrets?”

He looks around, drops his voice, and leans in like a schoolboy “You wanna hear how I once cried over a sea king because it reminded me of a soup my mom used to make?”

Your smile grows wider.

Nami watches this with raised brows.

You glance her way, then wink.

You twirl the umbrella from your drink between your fingers, eyes moving from one Strawhat to the next.

Sanji’s already yours. He hangs off every word you say like you’re some sea goddess he dreamed into existence.

Brook’s not hard either. You only had to compliment his style and call him “elegant” before he offered to write you a song “May I see your panties?” he asked, and you only laughed. Poor guy nearly exploded when you said, “Buy me dessert first.”

Usopp? Easier than expected. You said, “You look like a man who’s seen real danger” and he told you five war stories in two minutes. You told him his aim must be deadly, he blushed red and nearly spilled his water.

Chopper shyly asked if you were a doctor too. You leaned in and whispered, “Only the kind that heals broken hearts.” He squeaked and hid behind his hat.

Even Franky cracked when you complimented his “super” arms and asked if he could build you a weapon one day.

Luffy… okay, maybe not “seduced” but even he’s laughing at your jokes now. You told him he has the best smile in the world. He gave you a piece of his meat.

Robin sips her tea slowly, watching it all unfold. She doesn’t say much but she’s watching.

“You’re really good at this” she says at last, smiling.

You smirk “I study people. Their tells, their weaknesses. Most men just want someone who listens. Or laughs. Or touches their hand at the right time.”

Nami raises an eyebrow “So that’s your trick? Manipulation?”

“Call it… understanding.” You shrug.

Robin chuckles behind her hand “You’ve gotten into all of them.”

“All but one...” Nami says, standing from her seat. She points across the table.

Zoro sits there, arms crossed, one eye half-closed, sipping his drink like this entire thing bores him.

You grin “Ah. The hard one.”

“If you can crack him,” Nami says, folding her arms, “I’ll give you something I’ve never told anyone about. A treasure I found on Skarva Island. Secret map. Gold. Real deal.”

Robin arches an eyebrow “You never told me about that.”

Nami just smiles “Didn’t need to.”

You look at Zoro, then back at Nami “You’re serious?”

“Dead serious.”

You lean back in your chair, cracking your knuckles “Oh, now this is fun.”

Zoro hasn’t said a word in ten minutes. He’s just sitting there, arms folded, eye on you like he’s waiting for something to impress him.

You know the type. Stoic. Quiet. Sharp under the silence.

You lean your elbows on the table, turning your full attention to him now.

“Zoro, right?” you say casually.

He grunts “Mm.”

You rest your chin in your hand “Swordsman. Second-in-command. Scary.”

He doesn’t answer.

You smile “You don’t talk much.”

“Nope.”

“Because you’re mysterious? Or because you just hate people?”

“Both.”

That gets a soft laugh out of Robin. Even Nami cracks a half-smile.

You nod slowly “You know… the strong silent type is the easiest to read.”

Zoro raises an eyebrow, clearly unconvinced “Oh yeah?”

You lean in a little “You watch everything, but you don’t say anything. That means you trust your instincts more than people.”

He blinks. Stays quiet.

“But here’s the catch,” you go on, tone softening just a bit “People like you don’t hate people. They hate wasting time on people. There’s a difference.”

You meet his gaze. Steady. Calm.

“And I think,” you continue, lowering your voice just slightly, “you already knew I wasn’t a threat.”

His eye narrows.

You grin.

“That’s why you didn’t stop me before. And you were watching if someone else would.” You nod toward Nami.

Zoro doesn’t smile but he gives the smallest shrug, and says, “You talk too much.”

You lean back and cross your arms smugly “Which is your way of saying I’m not wrong.”

Zoro does a short nod towards you before drinking again. Which means you’re right.

Robin claps once, slowly, amused.

“Impressive” she says.

Nami leans forward on the table, hands steepled, eyes on you now with intent.

“Alright,” she says “You win.”

You raise an eyebrow “The treasure?”

She taps her pocket, smirking “We’ll talk about it.”

Later, most of the crew gets distracted arguing over dessert. Sanji is still telling Brook about how your smile “cured his heart.” You, Robin, and Nami linger at the table, your drink now halfway gone.

Robin leans over, voice low and curious “So tell us the truth. Why all the charm games?”

You swirl your glass gently “Men are easy. Predictable. They react fast. It’s all surface-level with them.”

Nami quirks a brow “So you don’t actually like any of them?”

You smile. Not flirtatious this time. A little softer “No. I don’t play with people I’m interested in. That’d be too messy. Too… distracting.”

Robin watches you with interest “So… women?”

You meet her gaze, then glance toward Nami. You speak slowly, honestly this time.

“I don’t joke about women.” you say “They don’t deserve that. When I speak to a woman, I want it to mean something.”

Nami’s quiet. She stares at you for a beat too long.

Robin looks between you both, then just sips her drink.

“So…” Nami says eventually, voice quieter now, “you play men… but you respect women.”

You nod once “Exactly.”

She leans back in her chair, studying you again. But it’s different now. Less suspicion, more… interest. Like she’s trying to figure out what kind of game this is, but maybe hoping it’s not a game at all.

“Alright,” Nami says, slowly, “what do you mean… when you speak to me?”

You grin “I guess you’ll have to keep talking to find out.”

You’re still sitting with Robin and Nami, tension slowly turning into something warmer, when a sudden voice cuts through the table:

“Hey!”

It’s Luffy. Of course.

He’s leaning over three empty dessert plates like they wronged him, hands on the table, grinning at you.

“You should join my crew.”

Your eyebrows shoot up “…Sorry, what?”

“You’re sneaky!” Luffy says, like it’s a compliment “You’re fun. You tricked everybody. And you’re smart like Robin but more annoying, like Nami.”

“Wow, thanks” Nami mutters.

“I mean it,” Luffy insists “You could be useful for missions. Infiltrate stuff. Get into places. Pretend to be people. Like a spy! That’s cool.”

You blink, then laugh “You want a con artist on your ship?”

He grins wide “Yup!”

Usopp leans in “That’s actually not a bad idea. We’re always getting chased or caught.”

Sanji’s eyes sparkle “As long as she’s on our side…”

“I am not babysitting another thief” Nami cuts in but her voice is dry, not angry.

Robin tilts her head, smiling “She’s already halfway in.”

Zoro shrugs “Just don’t steal my swords and we’re fine.”

Chopper tugs your sleeve “Can you fight, though?”

Luffy’s eyes widen “Yeah! Can you fight?”

You lean back, stretch your arms above your head, then smirk “I don’t pick fights. But I finish them. Okay, that was corny, but look.”

You reach down and lift your pant leg, revealing a slim blade strapped to your thigh. Not flashy, silent. Practical. Deadly.

“Knives,” you say “Fast, quiet, and sharp.”

Robin nods “Elegant choice.”

Nami tilts her head “Do you use them well?”

You grab your knife, point at a bounty poster at the other side of the local, all people in the middle enjoying their night.

“Look at the “O” of “dead Or alive”.”

You throw the knife without even thinking twice and hit right in the middle of the “O”.

Everyone at the table goes quiet.

You turn back, raise your glass, and smile “Good enough?”

Luffy slams both hands on the table “You’re joining.”

You pause, sipping the last of your drink, watching them all. This is insane. Reckless. Completely dangerous.

But… kind of perfect.

You finally set the glass down.

“Alright,” you say “I’m in.”

Later, as everyone leaves the diner and heads toward the Sunny, Nami walks beside you, her arms crossed, a smile just playing on her lips.

“You really said yes.”

“I like chaos” you say.

She glances sideways “You’re gonna regret this.”

You nudge her with your shoulder “I doubt it. I haven’t had this much fun in a while.”

Nami slows her steps just slightly, walking closer “…Let’s see if you can keep up.”

You smirk “Oh, I plan to do more than that.”

It’s been almost two years since you joined the Straw Hats.

You’re not the new one anymore. You’re family. You share the table. The chaos. The fights. The treasure. The sky above the Sunny at night.

And most of all, you’ve earned your place.

Your role? Simple. Infiltrate. Extract. Disappear.

It’s your gift. You blend in. Play a role. Men talk too much when you smile the right way. Say the right thing. It’s always worked.

Until now.

You’re inside a high-end lounge in Arcaen Port, dressed sharp, drink untouched, eyes locked on your target across the velvet booth.

Except your target… is a woman.

She’s calm. Powerful. She’s watching you the same way you usually watch others. And you freeze.

You hesitate... not out of fear, but out of something else.

This isn’t the game you usually play. Women aren’t pawns. They’re not jokes. They don’t deserve to be manipulated. And they don't let people manipulated them.

That’s always been your rule.

But this woman has the information you need. Info on a Celestial delivery, something that could save thousands. Luffy’s counting on you. So is the rest of the crew. Franky needs it to stop a weapons shipment too.

You take a breath. Let the moment settle in your chest.

Your voice goes soft. Flirtatious “I couldn’t help noticing the way you walk like you own the room.”

The woman smiles, leaning closer.

Hook set.

But somewhere on the sea, back on the Sunny, Nami watches through the transponder snail video feed. Robin beside her, calm as always.

The rest of the crew is off deck, but Nami stayed behind, “just in case.”

She’s used to this. You, sweet-talking idiots who fall for your smirk. It never bothered her.

Not when it was men.

But this... this is different.

You hesitate at first. She saw it. The slight twitch in your eye. The flicker of something in your hand.

And then you push past it.

You lean into the woman. Smile. Tilt your head the way Nami knows too well. Touch her wrist. Laugh.

Nami’s stomach twists.

Robin is quiet. Watching. Always watching.

“You okay?” she asks, softly.

Nami crosses her arms, a little too tight “Yeah. Why wouldn’t I be?”

Robin’s gaze lingers on her. But she doesn’t push.

Nami focuses back on the screen, where you’re now sliding closer to the woman. Saying something low. Intimate.

And something burns under her skin.

Jealousy.

A feeling she doesn’t recognize at first, because she’s never let herself have it. Never thought you with those men mattered.

But seeing you with a woman, doing what you swore you never would... it changes everything. Because now it could be real.

And Nami suddenly realizes something she didn’t want to admit.

She doesn’t want to watch this anymore.

She wants you.

Back on the Sunny, it’s chaos in quiet voices.

Sanji is pacing. Chopper is gnawing on his hoof. Usopp’s leaning on the railing, muttering, “She’s fine, right? She has to be fine.”

Nami’s already halfway to the mini-boat. Boots laced, windbreaker half-zipped, stubborn fire in her eyes.

“She said she doesn’t flirt with women,” she snaps “And now she’s all over one? What if something’s wrong?”

“She can handle it, Nami,” Zoro says flatly, arms crossed “You going there now could blow the whole thing.”

“She’s not stupid,” Robin says calmly “If she crossed her own line, it’s because it mattered.”

“You don’t get it,” Nami says suddenly, her voice rising “She—She’s reckless and arrogant and she thinks she’s untouchable—”

Luffy tilts his head “You’re mad?”

“Yes, I’m mad!” she snaps, throwing her arms up “She always flirts like it’s nothing! With every guy in every town! And now it’s with a woman and—”

She stops herself.

Everyone is quiet.

Even Sanji, for once, doesn’t speak.

Nami exhales, sharp and fast. Her fingers twitch like she wants to hit something and then, colder, she mutters “I hate her.”

Silence.

The kind of silence that doesn’t belong on this ship.

The kind that stretches a second too long.

And then your voice “Good to know.”

They all turn.

You’re standing at the edge of the deck, soaked in dim moonlight, cloak fluttering in the breeze. The shadows under your eyes say you heard enough.

Your tone is even, but there’s something off. The sharp glint that usually dances in your words is gone.

Nami’s eyes go wide.

You step onto the deck, holding up a small rolled scroll and a black coin “I got everything you needed. Names, routes, drop points. She cracked after three drinks and a smile.”

No one speaks.

You look… wrong.

Not physically hurt. Not bruised. But dimmed.

You hand the scroll to Robin without meeting her eyes.

“I’m gonna get some air” you mutter.

And just like that, you turn and walk toward the back of the ship, disappearing into the shadows near the observation deck.

The silence left behind is loud.

Luffy sits down, cross-legged, eyes on the floor “She looked… sad.”

“She never looks like that.” Usopp murmurs.

Robin just holds the scroll tight, her expression unreadable.

And Nami’s still frozen. Staring at where you stood. The wind tugging her hair around her face.

Her hands are clenched at her sides.

She doesn’t say a word.

You haven’t come back down since.

You’re still somewhere above, maybe the observation deck, maybe the crow’s nest. No one knows. Or maybe they just pretend not to.

Dinner came and went. You didn’t eat.

You always eat.

Sanji cooked your favorite. Left it warming, just in case. No one touched it.

Now, the moon is high, casting silver light across the Sunny’s deck. The sea is quiet. Almost too quiet.

Nami is pacing. Barefoot. Hair tied back. Jaw tight.

“She heard me,” she says for the fifth time “She heard me say I hate her.”

“She also heard the part before that.” Robin adds gently, sipping from a cup of warm tea.

Sanji leans against the mast, arms crossed, for once not playing the romantic fool “You don’t hate her.”

“I know I don’t!” Nami snaps “That’s the problem!”

Robin glances sideways at her “Then maybe it’s time you tell her.”

“I can’t just walk up there and say ‘Surprise, I don’t really hate you, I actually might be in love with you, sorry for being jealous of someone who didn’t even matter.’”

“Why not?” Sanji says simply.

Nami glares “You’re seriously okay with this?”

Sanji shrugs “You think I haven’t noticed? The way you look at her when she’s not watching? You only get mad when she flirts with someone smart. And now that she had to flirts with a woman.”

Nami groans “Sanji…”

He smiles softly, but it’s not his usual over-the-top grin “I want the both of you to be happy. Even if it’s not with me. That’s what love’s supposed to mean, right?”

Robin places a hand on Nami’s arm “You’re not alone in this. But she is. Right now. And that’s not fair.”

Nami’s shoulders drop. Her chest is tight.

She doesn’t like feelings. Doesn’t like being soft.

But this one’s already slipped through the cracks.

“Okay,” she whispers “Okay. I’ll go.”

You’re sitting at the back of the ship, legs dangling over the railing. The breeze cools your skin. You’re watching the stars but not really seeing them.

You didn’t cry. Not really. But your chest aches.

You always told yourself women were off-limits. You respected them too much. Admired them. Needed them to be real, not illusions.

And now Nami, of all people, thinks you’re just another act.

“Hey.”

You freeze at the voice behind you.

Nami steps slowly into view, hands in her pockets, hair messy from the wind.

“I’m not here to fight...” she says “Or yell. Or… accuse.”

You don’t speak.

“I messed up,” she continues “I got jealous, and instead of admitting it, I acted like a child. I said something I didn’t mean.”

You glance at her, finally “Why did it matter? Me flirting with her?”

Nami swallows “Because it was real.”

You tense.

“Because it wasn’t a game anymore,” she says quietly “Because you looked at her like you meant it. And that scared me.”

You stare at the waves “I didn’t mean it.”

A pause.

“I only did it for the mission,” you add “Even though it felt wrong. Even though I hated myself for it. Because I thought I could handle it for one time.”

Nami walks closer, sits beside you on the rail. Close, but not touching.

“I never wanted to be someone who made you feel like you weren’t safe here,” she says “But I did. And I’m sorry.”

The silence stretches again.

This time, it feels softer.

You speak low “Why are you really here, Nami?”

She meets your eyes, and her voice is so raw it almost hurts.

“Because I don’t hate you,” she says “I think I might… actually like you... like LIKE you… love… love you.”

Your breath catches.

You blink, stunned and then for the first time in days you smile.

The world is quiet.

Just the gentle hush of waves against the Sunny’s hull. The occasional creak of the ship. Stars hanging above you, soft and endless.

You stare at her.

Her words echo in your chest.

It’s everything and nothing. It’s terrifying. It’s real.

You laugh, breathless “You’re not saying that just because you feel guilty, are you?”

Nami rolls her eyes “Do I look like someone who says ‘I love you’ to fix guilt?”

“…Fair.”

She glances down, fingers brushing the edge of the railing beside you “I’m saying it because watching you with that woman—watching you break your own rules—made me realize something.”

You tilt your head “What?”

“That I don’t want anyone else getting that close to you again,” she murmurs “Even for a mission.”

You don’t say anything. You just look at her.

Her voice lowers “Not because I own you. But because I want to be the one who gets to be close.”

It comes out of you before you can stop it.

“Then be close.”

She blinks. Breath catches.

You shift. Slowly. Cautiously. A hand reaches out, halfway between you and her, fingers hovering.

Her hand meets yours.

Fingers slide together like they were always supposed to.

You watch her eyes. There’s still that spark. That fire. But it’s softer now. Waiting.

You lean in.

She meets you halfway.

The kiss is slow.

Not rushed. Not desperate. Just real.

Her lips are warm, sure. Her hand finds your cheek. You hold her waist. The world tilts for a moment, but you don’t fall. Not this time.

When you pull back, your forehead rests against hers.

Nami’s smiling.

So are you.

“Finally” she whispers.

You laugh “Yeah. Took us long enough.”

From somewhere above, faintly “WHOOOOOOA!!”

You freeze.

Nami freezes.

You both whip your heads up toward the crow’s nest.

Sanji’s head immediately disappears.

Robin’s voice follows, calm as ever “Sanji. We talked about spying.”

“IT WAS TOO ROMANTIC TO IGNORE” Sanji yells from somewhere off-screen.

You groan, covering your face. Nami’s laugh shakes her shoulders, and this time when she kisses you, quick and soft and just yours, she doesn’t hold back.

The next island is bright, busy, and full of overly confident men in shiny coats who think they invented charm.

Perfect hunting grounds.

The mission? Infiltrate a minor noble’s gala to collect intel about a secret Marine experiment. You and Robin are the inside team. Sanji’s security backup. Nami… is in charge of recon.

Or so she insists.

“Can I trust you not to fall in love in there?” Nami asks, arms crossed, eyebrow raised, the picture of dramatic girlfriend energy. You’re already halfway into your gala disguise: sleek dress, earrings, confidence dialed to ten.

You grin “You can trust me to do the job.”

“That’s not an answer.”

You lean in, kiss her on the cheek “I’ll be back before midnight. Try not to burn the ship out of jealousy while I’m gone.”

“Don’t test me.” she grumbles, but her cheeks are already pink.

Robin smiles softly beside you “You two are worse than Luffy and meat.”

Inside the Gala

“Darling,” purrs a man in gold-trimmed boots, bowing too low “Surely you’ve never been kissed by a general before?”

You smile politely, hand grazing his wrist just long enough to lift the coded invitation from his pocket.

“Not yet.” you reply sweetly.

Robin snorts behind her wine glass.

“I swear I’m going to stab someone.” Nami growls from the comms, listening in from the ship.

“You said she was retired from flirting.” Sanji whispers dramatically.

“She lied!”

Back on the Sunny, hours later you strut up the gangplank, mission completed, dress a little rumpled, earrings gone, but smiling wide. Robin follows, calm as always.

“Hey, I got it!” you call “They’re planning to move the research to a sky island in a week. And the general thinks I like poetry.”

Luffy cheers “Let’s go steal stuff from the sky!!”

Franky whoops. Chopper claps. Usopp asks about fireworks.

Nami’s marching down the deck, fire in her eyes.

“You told him you like poetry?” she demands.

“It helped” you say innocently.

“You winked five times.”

“You were counting?”

She throws her hands in the air “I am dating the most frustrating woman in the world!”

You grin and tug her closer by the waist “Yeah, but I came back to you.”

That slows her. Just a bit.

Then she rolls her eyes and kisses you anyway “Next mission, I’m going in.”