Admiral Kizaru is one of the Three Admirals in the Marines. He was first introduced at Sabaody Archipelago. Kizaru is extremely strong, and he was able to defeat 4 supernovas all by himself with ease. Kizaru was also the only Admiral among the three to have extremely low injuries at Marineford.
Today, I have made a list of people who can defeat this monster.
7. Silvers Rayleigh
Silvers Rayleigh was a member, and also the first mate of Roger Pirates. He possesses incredible strength and can use all three types of Haki. He was the only person who kept Kizaru at bay during the battle at Sabaody Archipelago. Rayleigh is also a strong swordsman as seen in his fight with Kizaru.