Niseluffy

The likeness Niseluffy shares with Luffy is striking, with only small wardrobe changes setting them apart, such as a white shirt worn beneath his Doskoi Panda brand vest. That close resemblance is exactly what lets him pass himself off convincingly as the captain of the Straw Hat Pirates.

Where the genuine Luffy is bold, this impostor is timid and underhanded. Niseluffy would rather push his subordinates into a fight than risk himself, and when the Set Sail Pirates corner him without backup he simply runs.

For combat he carries a whip that mimics Luffy's stretched limb, though it offers little against the real thing, since a single hit from Luffy leaves him barely able to stand. His knockoff move, the Gomu Gomu no Muchi, copies Luffy's whip attack by spinning the lash in a circle, which he performs to argue that he is the authentic captain. Tellingly, his whip takes the shape of an arm rather than a leg.

Together with Nisezoro and Niseusopp, Niseluffy began masquerading as the Straw Hats. Backed by their Nisenise Pirates followers, the trio attacked the 153rd Marine Branch, threw it into chaos, and bolted toward Orange Town. They ransacked that town too, harming residents and property before holing up in a bar at its edge, where they forced a local woman to cook and clean for them.

When Luffy and the Set Sail Pirates tracked them to the bar, Luffy branded Niseluffy a fraud, only for the impostor to flip the accusation and brandish his Gomu Gomu no Muchi as evidence. Luffy answered with a Gomu Gomu no Bullet that floored him. After his subordinates were overwhelmed outside and another blow dropped him again, Niseluffy stayed down while his partners lost to Luffy and the newly arrived Zoro. As Nezumi came to make arrests, he slipped in among the Set Sail Pirates to dodge capture, and once the young pirates caught on, he dove into the water and swam off.