One piece

Soku, a gentle soul with untold power, finds himself stranded in the perilous Grandline, a world brimming with pirates and the echoes of ancient civilizations. Gifted with an unprecedented mastery of Conqueror's, Armament, and Observation Haki, alongside mysterious 'multiple universe forms,' he seeks not glory, but a quiet peace alongside Princess Vivi. Their journey through a Grandline scarred by ancient pirate ruins unearths a sinister plot tied to the very origins of Devil Fruits. Soku must confront a burgeoning darkness that threatens to unravel the world's delicate balance, forcing him to embrace the destructive potential he so fears. Can his gentle nature endure the brutal choices required to protect those he cherishes, or will the power he wields consume him entirely?