Kaidou

Height: 710 cm (23'4")
Origin: Grand Line
Residence: Wano Country (Onigashima) Vodka Kingdom (former)
Affiliations: Rocks Pirates (former)
Beast Pirates (current)
Devil Fruit: Uo Uo no Mi, Model: Seiryu (Fish-Fish Fruit)
Devil Fruit Type: Mythical Zoan
Bounty: 4,611,100,000

Kaidou is one of the Yonkou (four emperors), and the third to be mentioned by name. Kaidou's name is first mentioned by Gekko Moriah shortly after having obtained Luffy's shadow. His title is revealed just after the Straw Hats defeat Moriah.