Kaido of the Beasts is one of the Yonko and the third to be mentioned by name. He is also one of the central antagonists of the Pirate Alliance Saga. According to Trafalgar Law and the manga, Kaido is known as the "strongest creature in the world". Kaido's name was first mentioned by Gekko Moriah shortly after he obtained Luffy's shadow. His title of Yonko was revealed just after the Straw Hat Pirates defeated Moriah.