The four strongest Bounty Hunters of West Blue, North Blue and South Blue. Their identity and role.
I. East Blue – Roronoa Zoro the Pirate Hunter

II. West Blue – Daz Bones the Killer

III. Nort Blue – Shiryu of the Rain
IV. South Blue – Ryokugyu the Green BullThis is 100% speculation now, but I believe either Fujitora or Ryokugyu was originally a bounty hunter. For this theory, I’m gonna assume Ryokugyu. And South Blue is the least well known of the four oceans, so it kinda fits. What I think is that Ryokugyu started out as a bounty hunter in South Blue and over time became known as the “new world’s most fearsome bounty hunter”. Furthermore, in the movie “Zatoichi vs. Yojinbo” holds two interesting details that could parallel Fuji and Ryo. First, they call each other “monster” and “beast”, implying equality. And second, Yojinbo is also portrayed as some sort of bounty hunter or at least someone who only works at a price. So maybe Ryokugyu is the exact opposite of Fujitora who joined the marines out of idealism, whilst Ryokugyu may have joined out of opportunism because the World Government offered him a huge amount of money so he gave up his bounty-hunting business?
Finally, the order in which Zoro will defeat them and claim his title as the world’s strongest (former) bounty hunter on top of that.
1. vs. Daz Bones (duh) – Zoro had to cut iron in order to defeat him (=breath of all things).
2. vs. Ryokugyu – Cutting through an admiral’s armament haki will be a huge deal.
3. vs. Shiryuu – Splitting diamonds to become the world’s greatest swordsman and whatnot.
What do you think?
*Theory by Charlotte Crunch