Twopiece: Poseidon POV [Onepiece]

Despite being siblings, they had always been at odds with each other, constantly bickering and arguing over everything. This rivalry eventually escalated into violence, got into a physical altercation that ended in tragedy. In the heat of the moment, they had killed each other.

As their souls drifted towards the afterlife, they were both filled with hate, and despair.

God granted them powers. Letting them forge their path in one piece.
They were given choice where to be born: Grandson of Garp, Dragon's Son.
Poseidon's POV

NOTE: There are two novels set in a same One-piece world. Both Poseidon and Thor have dedicated Fanfic, Check other out.