Hi! It's me again.
As I've told some of you readers, this one is peculiarly easy (at least I am convinced it is). It's centered around one character but mentions several others from their past. But really, I think everybody can guess that one.
I was actually thinking of inventing a melody for it. If I ever do, then I'll maybe record it and then post it on Youtube or somethin'. We'll see.

Also, from now on, I'll start giving the answers to the other riddles. The first one was originally called "October 6th" and is about Law (as the Moon) and Luffy (as the Sun). Few other characters are mentionned (Doflamingo is the 'common foe').

So, good luck with this easy one! If you don't find it I just might make fun of you. (There are soooo MANY clues...)

[Verse 1]

As you raise the sails
Do tell the tales
Of the many men turned to bones
Who remember clearly
That beyond the sea
Are those that they left alone

Alone to ponder and sigh
And alone to wonder why
Cursing the waves a-weaving
As far away under the sky
Searching where Berry-ed treasures lie
Their kin go on a-sailing

[Chorus]

Well I - yoh ho! - I keep singing this song
The words repeating on my ghostly tongue
This song rises, oh so sad and lonely
Spreading its sound over the deep dark sea
Further still through the ghostly fog
And I might as well - yoh ho! - go!

Go to sleep like a LOG.

[Verse 2]

As you raise the sails
Do tell the tales
Of the ships lost, of those who gave
To their loved ones a goodbye wave
Of those who turned round
At the last moment
Away from gold found
And then fell silent

And tell the tale
Of those who lost
At least one thing:
Some lost life's oath
And some lost both.
A lucky or unlucky one
Only lost the peace of death
And is off to keep the one oath

He still has left...

[Chorus]

And so - yoh ho! - I keep singing this song
The words repeating on my ghostly tongue
This song rises, oh so sad and lonely
Spreading its sound over the deep dark sea
Further still through the ghostly fog
And I might as well - yoh ho! - go!

Go to sleep like a LOG.

So? Did you by any chance notice the 'Berry-ed treasure' pun? I added it last minute ^^;