Ulti Kaidou is a prominent member of the Tobiroppo, a powerful group within the Beasts Pirates in the anime and manga series One Piece. Known for her brash and outspoken personality, Ulti is fiercely loyal to her captain, Kaido, and her younger brother, Page One. She possesses the Ancient Zoan-type Devil Fruit, Ryu Ryu no Mi, Model: Pachycephalosaurus, granting her immense physical strength and durability. Ulti plays a significant antagonistic role during the Wano Country arc, challenging the Straw Hat Pirates and their allies.