Usopp serves as a core Straw Hat Pirate member. He possesses tan skin, medium-length black curly hair, and a notably long nose. His typical attire includes an olive green plaid bandanna, specialized sniper goggles often positioned on his forehead or around his neck, brown overalls worn over a bare torso with a white sash, and a yellow satchel holding tools and ammunition.

His established personality manifests clearly. He exhibits significant cowardice, frequently screaming in terror during perilous situations like the trap coaster ride. Despite this fear, he engages in combat when required, utilizing his slingshot and specialized projectiles like the "Goren Kayaku Boshi" against a Giant Nine adversary. While known for tendencies to lie or boast, these traits remain unobserved during these specific events. He barely evades a gold harpoon thanks to Sanji's intervention.

He functions cohesively within the crew. He observes Franky gain a Kung-Fu Dugong's allegiance after defeating it. He receives protection from crewmates, including Zoro deflecting harpoons and Sanji kicking one away from him. Franky's new dugong subordinate later retrieves stolen cola barrels, enabling Franky to deploy the Coup de Burst and Gaon Cannon against the giants. Post-escape, Usopp agrees to a dugong rematch, prompting Nami to scold him and instruct Brook to put them to sleep.

His background, motivations, or unique character development specific to this encounter are unaddressed. His actions and reactions align entirely with his established pre-timeskip persona from the main series narrative. No permanent alterations to his character, abilities, or relationships stem solely from the depicted encounter with Captain Trap and the Trap Tower.