Akisu, the younger half of the Thief Brothers, forms an inseparable duo with the seasoned outlaw Borodo, who rescued him as an infant adrift at sea. Clutched to the child was a music box—the lone relic linking Akisu to his mysterious origins, later traced by Borodo to Clockwork Island. Their brotherly bond intertwines mentorship and protection, with Akisu initially leaning on Borodo’s guidance in their heists, his insecurities shadowing their ventures. Driven to steal Clockwork Island’s sacred Diamond Clock, their path collides with the Straw Hat Pirates after the Trump Pirates hijack the Going Merry. Akisu’s cunning surfaces as he baits the crew with a feigned drowning, yet his conflicted loyalty to Borodo and budding empathy for the Straw Hats expose his inner turmoil. A quiet turning point emerges when he fixes Luffy’s toy windmill—a subtle act of defiance against his own passivity, sparking Luffy’s resolve in battle. When Borodo sacrifices himself to challenge the Trump Pirates, Akisu sheds his timidity, confronting the villains head-on. Inspired by Luffy’s call to “stake his life for the future,” he embraces courage over dependency. Clockwork Island’s collapse under Bear King’s regime demands evacuation, but Akisu’s defiance aids its liberation. His journey culminates in a renewed pact with Borodo and a silent vow to restore his homeland, weaving resilience and found family into his legacy.