Yokozuna

Yokozuna (ヨコヅナ Yokozuna) is a giant sumo-wrestling frog, who was a friend (as well as pet) to the legendary shipwright Tom until Tom's execution.

Appearance
He's a giant frog with yellow-brownish skin with black hair styled in an afro-style. He has numerous scars on his belly (from testing his strength against the Sea Train). He has also fanged teeth.

Personality
He cares very much for his friends and loved ones. He is exceptionally loyal to Franky who taught him to crawl-stroke when they were younger.

Powers and Abilities
He's a powerful swimmer and he's strong enough to knock out a Sea Train. Although, it did leave him some scars on his belly.

History
After that, he would always swim through the waters around Water 7, stepping in the way of the Sea Train to try and stop it. This habit is said to be caused by Yokozuna wanting to become stronger so he won't lose anymore of his loved ones. In fact, when he was first introduced, he was performing this very routine when Zoro spotted him from the Going Merry; after informing the rest of his crew about the giant frog swimming in a manner not unlike to a human, Luffy decided to slightly change course (they were headed to the next island, which happens to be Water 7) to capture the giant frog so his crew could have a nice barbecue meal. This habit also caused him to try and stop the Rocket Man while the Straw Hat Pirates, Galley-La Foremen, and Franky Family were traveling towards Enies Lobby, and he ends up helping them in their attempt to get Franky and Nico Robin back. While on Enies Lobby, he is in charge of preventing any government agents from getting into the courthouse, and does well until the Jurors arrive and attack. He is then saved by the giants Oimo and Kaashii, who decide to help him guard the courthouse. Yokozuna boarded the sea train with the Franky Family, the Galley-La, and the giants and has since returned to Water 7. He was recently seen in a "where are they now" title page, no longer challenging the Sea Train.

Franky taught Yokozuna to use crawl-stroke when swimming.

Trivia

 * Yokozuna means "horizontal rope" and is the highest rank in professional sumo.
 * Yokozuna may be named after WWE wrestler Rodney Anoa'i, who wrestled under the ring name Yokozuna and used sumo as a gimmick, although he never competed in it.
 * Yokozuna is the first character from Water 7 to appear, and the first one seen by the Straw Hats.