Crocodile

Sir Crocodile, also known as the "Desert King," is a former president of the notorious Baroque Works criminal organization. He operated under the alias "Mr. 0" while his vice-president and partner, Nico Robin, went by the name "Miss All Sunday." He is the main antagonist of the Arabasta Arc and the overarching Arabasta Saga, and later appears as a supporting character in the Impel Down and Marineford Arcs. Crocodile is a formidable foe and is one of the most significant adversaries in the series. He was the first enemy to hand Luffy a crushing defeat. Initially, Crocodile was one of the Seven Warlords of the Sea, but he lost his title after trying to take over the Arabasta Kingdom.

Luffy frees Crocodile from Impel Down in exchange for his assistance in rescuing his brother, and Crocodile joins the Summit War on the side of Luffy and the Whitebeard Pirates. Following the war, Crocodile establishes the Cross Guild in the New World with Dracule Mihawk, another former Warlord. The organization's figurehead is Buggy, a current member of the Four Emperors, who serves as a distraction to attract unwanted attention away from the guild's true leaders. Crocodile's powers stem from the Suna Suna no Mi, a Logia-type Devil Fruit that allows him to create, control, and transform his body into sand. He has honed his ability to the point of perfection and can reflexively turn into sand if attacked. In a desert or sandy area, he is nearly invincible and can create sandstorms, quicksand, and bladed weapons. He can also absorb all moisture from living and non-living objects via his right hand, which causes dehydration and destruction. However, this technique does not work on metallic substances, and any moisture that comes into contact with his body immediately reverts to a solid form.