Game One Piece Riddle Game

[Phos]

I saw a similar game on another forum, so I thought I'd create one here.

-Rules-​

1. The first to host the riddle will be the person who started the thread.
   
2. People guessing have 5 guesses per 24 hours.
3. Everyone must explain their guesses
4. The answer to the riddle can be a character, place or an object from the One Piece universe.
5. Once somebody gets the answer, they become the new host and the game continues.

What is acceptable

1. You can write anything One piece related
2. Your description is unlimited you can write as many details as you want to describe what you want to describe or you can make you're description short. The choice is up to you. Choose wisely.
3. You can add in pictures to accommodate what you are trying to describe.

What is not acceptable

1. If you are describing something do not say anything that could reveal the answer to your riddle
   
2. Please limit off-topic posts
3. Don't describe anything non One Piece related
4. Vague descriptions such as 'I am a man with a hat' or 'I have a red shirt' will not be tolerated
5. No non-canon material

With this said, I am the first host, so without further ado, here goes.

I once knew a man who made a sea of flames
Neither of us could have been tamed
I am the bearer of the worst kind of curse
He is the bearer of the world's worst sin​