What is the connection between 'Manga Soul' and 'One Piece'?

The two, Soul King and One Piece manga, have no inherent link. They are distinct creations with separate characters, themes, and storylines. One Piece has its own rich lore and fan base, and Soul King exists independently of it.

It's possible that One Piece Ultimo manga shares a common universe with the original, or it could be a prequel/sequel exploring different aspects. Could also have callbacks or references to the main story.

I'm not sure there's a direct connection. Maybe Tomo is a character in a related spin-off or fan work, but not in the main One Piece manga.

Joyboy is a mysterious and significant figure in the One Piece manga. It's believed to have some crucial role related to the overarching story and the ultimate treasures.

I'm not sure there's a direct connection. Maybe bluebell is a character or element introduced in a special chapter or spin-off of One Piece manga.

The connection could be that Uta might be a new character introduced in the One Piece manga or have some significant role or storyline related to it.

Not much. Cadeau manga might be a completely different genre or series with no direct link to One Piece.

I don't think there's a direct connection. One Piece is mainly about adventures and pirates, not related to sunsets specifically.

There might not be a direct connection. One Piece is a long-running manga series, and Halloween is a holiday. Maybe there could be fan-made One Piece-themed Halloween costumes or events, but not an official link.

There's no direct connection. 'Tail' and 'One Piece' are likely two separate manga with distinct storylines and characters.