Yamato is the daughter of Kaido of the Four Emperors and self-proclaims to be "Kozuki Oden". This profound admiration for the legendary samurai has led to the decision to embody everything related to the samurai to the extent of proclaiming to be a man as well, and hence Yamato is widely referred to as Kaido's son.

Appearance.
Yamato is tall, being slightly over twice Luffy's height but not nearly as tall as Kaido. Yamato has long, white hair that is bound between orange rods into a ponytail at the back, which fades into aqua green and then blue the further down it goes, and ends in rectangular locks similar to Kaido. Yamato also has large, orange eyes with prominent eyelashes, and wears gold hoop earrings on both ears and has red horns. Clothing-wise, Yamato wears a pair of red hakama pants and sandals, and, much like Oden, wears a large purple and white nio-daisuki behind the back.[5]

Yamato's current outfit is a sleeveless white garment with a diamond-shaped design on both sides and an indigo, wisp-patterned bottom half. This garment was originally a sleeved kimono with long white sleeves, but these were later ripped off, leaving the garment sleeveless and making it more form-fitting. Also, while in disguise, Yamato originally also wore a hannya mask, which has a wig with an extremely long and wild mane attached to the top and a long goatee attached to the bottom.[5]

Around 3–4 years ago, Yamato wore a long-sleeved outfit similar to her current one, but with different symbols on the breast area. The symbols resemble an oden skewer.