Yamato, also known by her epithet as the Oni Princess, is a major character of the One Piece franchise who first appeared in the Wano Country Arc. She is the daughter of one of the Four Emperors of the Sea, Kaido, who also holds many epithets. Since the moment of his death 20 years ago, Yamato idolized the legendary samurai, Kozuki Oden when she was just 8 years old, thereafter, she started declaring herself to be Oden.