Ulti Kaido is a prominent antagonist in the anime and manga series 'One Piece.' She is a high-ranking member of the Tobiroppo, the elite group of the Beast Pirates led by Kaido. Known for her assertive personality and fierce loyalty to her younger brother Page One, Ulti possesses the power of the Dragon-Dragon Fruit, Model: Pachycephalosaurus, enabling her to transform into a dinosaur. She plays a significant role during the Wano Country Arc, serving as a formidable opponent to the Straw Hat Pirates.