Devil Fruit: Gasu Gasu no Mi
Caesar Clown, also known as "Master" by his subordinates, is a former colleague of Vegapunk and the main antagonist of the Punk Hazard Arc. He is an expert in mass-murder weapons and a mad scientist with a bounty of 300,000,000 beli.
He holds a grudge against Vegapunk and displays a rational personality, choosing to hide from the Marines rather than confront them immediately. Caesar trusted Monet's assessment that the Straw Hats might be stronger than their bounties suggested and waited for Joker's approval before initiating attacks. He is economical, collecting and compressing poison into Smiley instead of wasting it. Smoker described him as a "crazy bastard."
Caesar is prideful, claiming his work four years ago on the mass-murder weapon that caused the Punk Hazard incident was not a failure but a great success, indicating a superiority complex. Unlike most Logia users, he keeps his Devil Fruit power activated constantly, often appearing partially or entirely as gas.
His superiority complex becomes evident when Luffy mentions that his Gasu Gasu no Mi had no effect due to Magellan's Doku Doku no Mi. Caesar became agitated at being compared to a mere Paramecia user. He is ruthless, using his injured subordinates to test new gases and ordering the Yeti Cool Brothers to kill Brownbeard when he deemed him useless. Caesar used the restricted drug NHC10 to control the kidnapped children, exploiting their painful withdrawal symptoms. This disgusted Law. Caesar enjoys cocktails and is often seen holding a cocktail glass.
His distinctive laugh is "Shurororororo."
