Questions & Mysteries Man marked by flames

One possibility is that the man marked by flames could be an ancient Sea King that has gained intelligence and power through eating a Devil Fruit. This would explain his ability to create whirlpools and command the sea, as well as his mysterious and powerful nature. Additionally, it could tie into the overall theme of the series, which highlights the relationships between different species and the power dynamics between them.

Another theory is that the man marked by flames could be a member of the Celestial Dragons, the ruling class of the World Government. This would explain his access to powerful weapons and technology, as well as his desire to keep the Road Poneglyph out of the hands of pirates and other outside forces. Additionally, it could add another layer to the already complex political and social structures of the One Piece world.

However, these are just speculations, and only time will tell if they hold any truth.