Kaido of the Beasts, renowned as the "Strongest Creature", is the Governor-General of the Beasts Pirates and one of the Four Emperors ruling over the New World. He is also the father of Yamato. From his base on Onigashima, Kaido has occupied Wano Country along with his crew and once allied with Wano's shogun, Kurozumi Orochi, until Kaido decided to dispose of him for his New Onigashima Project. Decades ago before the formation of his own crew, Kaido was an apprentice in the legendary Rocks Pirates, and he is currently in an alliance with his former Rocks crewmate and fellow Emperor, Big Mom.
Kaido was first referred to by Monkey D. Garp in the Post-Enies Lobby Arc and then directly mentioned by Gecko Moria in the Thriller Bark Arc, with his status as one of the Four Emperors revealed after the Straw Hat Pirates defeated Moria. Thus, Kaido is the third Emperor mentioned by name and the last to debut. Before he debuted in person, his voice was heard in a flashback that Kozuki Momonosuke had when first disembarking on Dressrosa. He is the primary antagonist of the Wano Country Arc and one of the central antagonists of the Four Emperors Saga. Kaido is a middle-aged man who cuts an imposing figure due in equal measure to his great height (standing at slightly shorter than his subordinate Jack, who stands at 8.3 meters (27 feet)) and muscle bulk, easily dwarfing normal humans. Overly top-heavy in build, he has a broad, well-muscled torso with wide-set shoulders attaching to strong, mascular arms, and somewhat out-of-proportion legs; far less heavily built than his arms yet about the same length (with his feet much tinier than his hands). Kaido's head, atop his bulky neck, is disproportionally small as well (smaller than his hands) and has a massive pair of gray-white, sharp-pointed horns come out of its sides, curving slightly to the front, then upward. He has a longish face with a heavy, hairless brow ridge topping sharp, often bloodshot eyes, (parent to small, yellowish irises)[30] plus a hook nose and large, full-lipped mouth. Kaido is near-always seen frowning and has moderate wrinkles: particularly prominent being his crow's feet below his eyes, forehead lines, and laugh lines from always sneering. His black hair consists of an unruly, mostly swept-back mane reaching his mid-back, and forming distinctly flat, rectangular locks of which some fall down near the front, over his ears, or jut upward. His facial hair is neat, done in a wavy, waist-length Fu Manchu mustache that pairs with a spiked goatee across his chin. Right of his defined abs is his only scar: a massive, recessed X-shape whose upper points reach to his pectoral, given to him by Kozuki Oden. A tattoo of dim-red segments resembling reptilian scales, individually bordered in orange, goes from his left pectoral down the front of his left arm, ending in correspondence to the wrist with a white (dark in the manga), traditionally shaped skull on the lower forearm.
Clothing-wise, Kaido dons a blue-purple, feathered sleeveless overcoat draped on his shoulders,, and below a lavender, tight-fitting, open shirt with long sleeves. He has a black bracelet with golden (dark in the manga) spikes above each wrist. Upholding said shirt is a thick, off-white belt of laid rope festooned with a pair of white, hanging shide in the front. More outwardly from below the rope hang two additional pieces of fabric: rectangular, hemmed flaps (which may be the bottom of said shirt) that each have, from two hemmed holes at their bottom, a short, thick, golden torus chain attached to themselves. Two yellow straw cords are below the shimenawa, serving as waistbands to secure a short, hanging row of thin, red ribbons. Finally, the rest of his lower wear consists of simple, baggy pants of gray-green color, tucked below the knees into simple, blackish boots. 20 years before the current storyline, Kaido's Fu Manchu was only chest-length, he lacked his current beard, had much fewer wrinkles, and until his battle with Oden did not have any visible scars on him. During Oden's execution, he wore the pairing of a black, sleeveless leather jacket and black, tight leather pants, with a belt featuring his crew's Jolly Roger on its big, round buckle. At the time due to the injury he suffered from fighting Oden, Kaido's chest and abdomen were heavily bandaged. Kaido is a merciless, aggressive, and confident warrior who never misses an opportunity tgain an advantage in war. He suffers from bouts of apathy and boredom, harboring a general sense of unconcern for most things including the very nature of the world and the lives of himself and his subordinates. He keeps a grumpy disposition with little pleasure and excitement in his life and is constantly frowning most of the time. As such, he craves excitement and chaos, wanting to start the largest war in the world because he felt it was too mundane. This recklessness, coupled with his apparent inability to die, has caused Kaido to make attempted suicide his hobby. Kaido has a very positive view on death, thinking that it is the moment a person achieves true glory. As such, he admires those who die fighting until the end, such as Gol D. Roger, Edward Newgate and Kozuki Oden. Kaido is a heavy drunkard who loves to drink sake, which causes his mood to change erratically. For example, he quickly went from being melancholic over his inability to increase the number of his Gifters and fulfill his dream of having a crew consisting of only Devil Fruit users to becoming angry and violent, brutally beating his subordinates and cursing Luffy and Law. While drunk, Kaido may become more destructive by accident since he ends up caring little for his surroundings, to the detriment of his own crew and their operations. In fact, Kaido is such a habitual drinker that he even dislikes being sober at any given time.
