Are There Villainous Young Ladies on the Grand Line Too?

I was reincarnated.

In this life, I'm beautiful, rich, and fabulously wealthy. Everything is great, except that I have to wear a bubble helmet whenever I go out.

Then I realize I'm in a manga world, and as a villain, I'm destined for a miserable ending.

To change my fate, I resolve to do something about it.

But I'm too weak to lift or carry anything, and the only thing I have going for me is my stunning beauty...

I've decided. I'll flirt with the main characters!

...Wait, aren't the main characters the hardest people in the world to handle?

Then I'll practice on these Marines first!

Huh? You say my red-haired fiance will get mad?

At his age, he should be grateful he can marry a young beauty like me!

Third-person perspectives:

[Borsalino]

When that Celestial Dragon lady came looking for him, Borsalino smiled despite his disgust. The smile seemed frozen on his face.

He humored her casually, not putting much effort into treating her well.

He watched her try hard to smile in a way that would please him, watched her bloom beneath him, crying pitifully...

And later, he watched her gaze linger on other men, without even sparing him a glance.

It was just a Celestial Dragon lady's game of love... So who was the one who took it seriously?

[Shanks]

"I'm your brother's fiancee!"

She made this imperious declaration, hoping a pack of nasty pirates would treat her gently.

Shanks looked at her with pity, as if she were a little lamb walking straight into a wolf pack.

He was no good man, and the same sinful blood ran through his veins. Yet he looked down on her as if passing judgment, smiling as he punished her for her misdeeds.

"We don't go easy on bad guys, you know..."

[Luffy]

"I hate Celestial Dragons, but I don't hate you!"

The black-haired boy grinned, showing his white teeth. His smile was bright and pure.

She could get everything she needed from that boy, and it seemed he only ever gave without asking for anything in return.

But when she tried to leave, his rubber arms wrapped around her so tightly she couldn't move. The boy pressed close against her, his voice full of carefree laughter.

"Shishishi... How strange. Didn't we agree to be together forever?"

Notes:

1. The heroine will get stronger, but not overwhelmingly so. She'll be able to protect herself.

2. This is an all-male-character story written to cater to certain tastes, and the three characters in the blurb aren't the only ones. It's not a plot-driven story about an overpowered heroine.

3. Since she's a Celestial Dragon and a villain, she may be treated quite harshly.

4. The main story is written in third person.

Theme: Persevering through setbacks and remaining steadfast