Lei Jin travels through the world of One Piece, awakens the Shock Fruit at the beginning and binds to the Pirates of All Worlds system, and destroys the miscellaneous fish pirates who rob merchant ships in the East China Sea. He met Luffy in Windmill Village by chance and witnessed Luffy's passionate moment when he went to sea. After getting acquainted with Zoro, they had a brief exchange of ideas, and his strength was recognized by Zoro. Lei Jin then accepted the system mission to defeat the East China Sea Overlord Creek Pirates, used the power of the Shock Fruit to crush the ghost man Ajin, blasted Creek, subdued a group of loyal men, and formed the Thunder Pirates. During this period, he defeated the encirclement and suppression of the East China Sea Branch of the Navy, awakened the Overlord's Haki, developed the Shock Fruit to an intermediate level, and became a veritable "Hegemon of the East China Sea". In the end, Lei Jin led the Thunder Pirates and sailed towards the Great Route, opening a new chapter in conquering the sea.
