One Piece: The Marine Ancestor

For a hundred years, the Marines' formidable power, born from a single man's unbreakable resolve, now approaches a new era. In the dynamic, tumultuous world of One Piece, Rowan's arrival was intended for rapid acquisition of god-like strength. However, fate intervened, leaving his system in a decades-long loading state. Consequently, instead of commanding vast cosmic power, Rowan became a foundational force behind the World Government, actively shaping history from behind the scenes. He cultivated the legendary Marine Hero, Monkey D. Garp, a figure of immense righteous anger. Rowan also established a strong connection with the future Fleet Admiral, Sora, who would become a frontline warrior. His influence extended further, as he trained a generation of powerful naval commanders, including Sengoku and Zephyr, preparing them for future conflicts.