Despite being the weakest crewmate (according to Oda) Usopp is the fourth crewmember to awaken Haki behind the Monster Trio.
In addition to the Straw Hats’ jolly roger, Usopp also has one of his own, like all the other members of the crew. The flag was first seen when Luffy asked him to design and paint a Jolly Roger for the crew. Though it was supposed to reflect everyone, Usopp designed his own jolly roger as their symbol, reflecting his delusions of captainship. It has Usopp’s nose, bandanna, a star, and a slingshot for a cross-bone. Usopp’s design was immediately rejected.
Usopp has a second personal jolly roger after the timeskip. In this version his skull is seen on its left side with Usopp’s new hat, headphones, and his curly hair tied back. The Kuro Kabuto is seen on its side in the background.
Usopp can be seen in the corner of Luffy’s former wanted poster and Zoro’s former wanted poster. In Luffy’s he is simply viewed from behind. In Zoro’s his silhouette is faintly seen through the smoke in the background of the poster doing his Crocodile impersonation.
It is possible that Usopp’s long nose was inspired by the fairy tale “Pinocchio”, as Pinocchio was a wooden puppet whose nose grew longer whenever he told a lie.
Ironically, most of the tall tales he told Kaya have came true at some point during the Straw Hats’ voyage. These include meeting a giant goldfish (as the crew was leaving Little Garden) fighting against a giant mole (against Miss Merry Christmas during the climax in the Alabasta Arc), meeting dwarves (when Robin and Usopp were captured by dwarves in Green Bit) and being a captain (as he is called by all the toys and dwarfs when he frees them on Dressrosa)
Ironically despite being a coward Usopp has no fear of spiders as in seen in Jaya. Even picking up a tarantula and petting it while the usually much braver Sanji jump into bushes at the mere sight of the arachnid.
He is the one who introduced the rubber band to the Skypieans.
Kappei Yamaguchi, Usopp’s Japanese voice actor, came up with the notes to the Sogeking song. Oda provided the words and then asked him to develop the notes himself. Kappei also stated that the Sogeking song is the most requested song for him.
In the real workd, Usopp’s nationality would be African.
Usopp would be a graphic designer if he weren’t a pirate.
In the 5th Japanese Fan Poll, Usopp was voted the thirteenth most popular character in One Piece.
Usopp’s birthday is on April 1, which is April Fool’s Day. This is quite fitting considering Usopp’s ability to fool people.
