Novel info
One Piece: Blood & Gunpowder

In a confrontation against a criminal faction, Marcos, a police officer recently accepted into the police force, loses his life while defending the lives of his companions. Thanks to his efforts, he managed to save everyone. but ended up paying with his life.
When he opens his eyes again, instead of finding himself in the void of nothingness, he is faced with the sound of waves and a beautiful view of the sea, his appearance has changed, finding himself in a strange world, but with a new appearance and identity.