One Piece: My Crew Uses Zanpakuto

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'So I really got Future Sight!'

Ikki felt happy when he saw the words "Future Sight" in his abilities.

'Demon Slayer's Breathing techniques are really useful. Nami and the others should practice their breathing more carefully. Maybe they can also learn to use the Transparent World and get Future Sight through it.'

Even as he thought this, Ikki knew it wouldn't be easy. Getting Future Sight was hard enough - even getting Advanced Observation Haki would take time.

'Better focus on this fight for now.'

Ikki shook his head and continued his serious match with Nami while getting used to his new ability.

"No, Nami, you're swinging too slow."

"That angle's not right. Lift your sword higher."

"Timing, I've told you many times, timing is key - move faster!"

"That's better. Keep your swings quick."

"Try to match your Thunder Breathing with your sword's lightning better."

"Come on, keep it up!"

Soon the whole arena was filled with Ikki's voice coaching Nami.

"I think I'll go exercise now," Robin said, turning away from watching Ikki and Nami's match. "I need to use my time well to train properly."

She picked up the bag with the nutritional potions and spoke to Vivi and Nojiko. "The navigation work is better with two people anyway."

After joining the Explorer and learning about the crew, Robin realized how much weaker she was compared to Nami, Nojiko, and Vivi. Now she needed to make the most of her time using the nutritional potions to get stronger.

"Sure, we'll handle the navigation," Nojiko nodded.

"Feel free to practice," Vivi added with a nod.

Now that they were crewmates, Vivi was starting to set aside her bad feelings toward Robin.

Robin glanced once more at Nami and Ikki, then left the Sword Training Room to start her own workout in the gym.

A few days later.

Under a clear blue sky, the Explorer sailed slowly with the sea breeze.

Nami, Nojiko, and Vivi were lying side by side on deck chairs in casual clothes, enjoying the bright sunshine.

Meanwhile, inside the gym, Ikki sat in a chair with a sketchpad, drawing.

Across from him was Robin, wearing tight workout clothes that showed her stomach and legs.

She was doing squats with a barbell, sweat covering her body and dripping onto the floor after her long workout and the effects of the nutritional potions.

[Ding! Host's partner Nico Robin's life force has reached B level. Special reward: 'Beginner Observation Haki Awakening Potion' x1]

'Beginner Observation Haki Awakening Potion? Shouldn't it be Armament Haki?' Ikki frowned, feeling confused.

When Nami, Nojiko, and Vivi reached B level, they all got "Beginner Armament Haki Awakening Potion."

'Maybe the rewards are random? Sometimes you get Armament Haki, sometimes Observation Haki?'

Ikki chewed on his pencil, thinking it over.

"Ikki, what are you thinking about?" Robin walked up behind Ikki and gently put her hand on his shoulder. Her eyes fell on the drawing in his hands.

When she saw the picture of herself squatting with the barbell, body covered in sweat with some drops falling on her chest, breathing hard, the smile on Robin's face grew wider.

She smiled because the Robin in Ikki's drawing looked so sexy.

"Ikki, before you became a swordsman, were you perhaps making adult picture books?" she asked.

"Huh? Why do you ask that?" Ikki snapped out of his thoughts and looked at Robin with surprise. When he saw her looking at his drawing, he understood.

"Well... Robin, you look too good when you're working out," he said. "If you were wearing a princess outfit, I might draw you looking more elegant instead."

Ikki smiled, put away his sketchpad, and took out the 'Beginner Observation Haki Awakening Potion' he'd just received, handing it to Robin.

"Ikki, I still have two bottles of B-level nutritional potions I haven't used yet. You don't need to give me more potions."

"This isn't a nutritional potion," Ikki explained. "It helps you awaken Observation Haki. It's just the basic level, though."

"Observation Haki Awakening Potion? Ikki, you really have so many amazing things."

Robin's eyes widened in surprise as she took the potion from Ikki and drank it.

Right away, she felt a new power inside her body.

At the same time, Ikki checked Robin's updated stats:

[Name: Nico Robin]

[Age: 28 years old]

[Weapon: Senbonzakura]

[Life Force: 4160, level B]

[Swordsmanship Realm: Iron-Cutting Realm]

[Swordsmanship School: Flower Breathing (Kanao Tsuyuri)]

[Special Ability: Flower-Flower Fruit, Beginner Observation Haki]

[Items: B-level nutritional potion x2]

"So this is Observation Haki? It's amazing," Robin said with wonder. "I never thought I'd master an ability that Shichibukai couldn't use."

"You mean the former Shichibukai," Ikki reminded her. "He's lost that title now. And compared to what a Zanpakutō can do, Haki isn't that special."

"True, he's not a Shichibukai anymore," Robin agreed. "But Ikki, isn't it strange? To save face, the World Government is claiming it was Marine Hina who caught Crocodile, and they've even promoted her to Commodore."

As she spoke, Robin looked at the latest newspaper on the counter.

"Whatever, I don't care about fame," Ikki shrugged.

"Ikki is so generous. I thought you might ask Commodore Hina for something in return."

"Hm? That's not a bad idea. Maybe she could use her Marine connections..."

"Connections? I thought you might ask Commodore Hina to model those embarrassing outfits for you again," Robin teased.

"Am I that kind of person?" Ikki protested.

"Aren't you?"

"Really? Anyway, shouldn't you take a shower? Even you must feel uncomfortable with all that sweat."

As he said this, Ikki looked Robin up and down, his eyes stopping at her chest.

"By the way, Robin, have you gotten bigger in the past couple days?"

"You noticed, Ikki? They have grown larger. I was wondering if your nutritional potions have other effects?"

"I don't think so," Ikki said, puzzled. "Nami and the others didn't change like you have. They just got stronger. Maybe because you're 28, the potions are helping you develop more? Also, has your skin gotten lighter?"

"Ikki, do you think I'm old?" Robin asked with a raised eyebrow. "But my skin... does seem a bit lighter. Am I really going through a second growth spurt?"

Looking at herself, even Robin found it strange.

Ikki remembered how Robin had changed between the pre-timeskip and post-timeskip in the original One Piece story.

Robin was an adult, so her chest shouldn't be growing anymore, and there was no reason for her skin to get lighter.

But it had!

Ikki had thought the change in the original story was because of her environment.

Now seeing Robin change, Ikki wondered if Robin's appearance two years later was actually because she got physically stronger.

"Second growth is second growth. Nothing wrong with that," Ikki said.

"You should like this, right? After all, you said you like mature and sexy women, didn't you? But Ikki, do you like that my skin is getting lighter?"

Robin laughed.

"Lighter skin is fine," Ikki said. "If you want to get tan again, just sunbathe more. But something seems to be happening on deck. You should clean up, Robin. I'm going to check it out."

Ikki stood up and walked toward the gym door.

His Observation Haki had picked up the rapid heartbeats of Nami and the others on deck.

Nami was even rushing toward the gym.

"Something's wrong on deck?" Robin's face immediately turned serious. She grabbed Senbonzakura from the counter and said, "Ikki, I'm coming with you."

Ikki glanced at Robin's serious expression, nodded, and led her out of the gym into the Explorer's hallway.

"Ikki, this is bad!" Nami cried as she ran up to them in the hallway.

Without explaining, she grabbed Ikki's hand and pulled him toward the deck.

Ikki had to reach out and grab Robin's arm to bring her along.

"Calm down, Nami. What happened?" Ikki asked calmly as they moved. "It's not like we're under attack."

He had already fully activated his Observation Haki and could sense everything within thousands of meters. He didn't detect any enemies nearby.

"I can't be calm, Ikki," Nami insisted. "There's something really scary in the sky. Just look!"

Nami led Ikki and Robin to the deck and immediately pointed up at the sky.