Jango, once a pirate, now serves in the Marines. He originally acted as first mate and hypnotist for the Black Cat Pirates under Captain Kuro. In Syrup Village, he aided Kuro’s three-year plot to murder Kaya and steal her inheritance, employing hypnosis to put Luffy to sleep and pressure Kaya into rewriting her will. The Straw Hat Pirates and Usopp defeated him, stranding him on the island. Later, on Mirrorball Island, Jango won a dance contest and encountered Marine Lieutenant Fullbody. When pirates attacked, Jango helped Fullbody rescue a hostage and defeat them. Sentenced to death for piracy, Fullbody secured his pardon. Both enlisted under Captain Hina. Jango advanced through Marine ranks, fighting in pivotal events like the Battle of Marineford—witnessing Whitebeard’s assault and Luffy’s Haoshoku Haki. By the Zou Arc, he became lieutenant commander. He escorted the Nefertari family to Mary Geoise for the Levely and monitored the Red Port during the interception of Big Mom and Kaidou’s communication. At Egghead, he accompanied Brannew to G-1’s ship graveyard, uncovering Vice Admiral Garp’s battleship training regimen. In *One Piece: Stampede*, Jango joined Marine forces at Delta Island’s Pirates Festival, battling pirates alongside Fullbody during Buena Festa and Douglas Bullet’s uprising. His core power is hypnotism, activated by a pendulum and the phrase "One, Two, Jango." It can induce sleep, enhance strength, or implant commands but fails if targets close their eyes or know the trick. A key flaw is accidental self-hypnosis when he neglects to shield his own eyes. He wields a sharpened chakram as both pendulum and throwing weapon, slicing through objects like tree trunks. Jango’s eccentricity and occasional incompetence surface in self-hypnosis incidents and flashy outfits. He passionately integrates dance into movement and combat. Despite quirks, he displays loyalty through dedicated service under Hina.