Yamato is the daughter of Kaidou of the Four Emperors. Despite Kaidou’s makes an attempt at making Yamato his inheritor, she as a change developed a profound admiration for the Wano samurai Kozuki Oden. After Oden’s loss of life, Yamato assumed his title and mannerisms.
She is a prime ally of the Ninja-Pirate-Mink-Samurai Alliance throughout the Wano Country Arc.