Rob Lucci

As the strongest member of CP9, Rob Lucci's great power is acknowledged even by the Shichibukai.] Even at the tender age of thirteen, Lucci was already known to be a very capable mass-murderer, having killed 500 soldiers and a crew of pirates single-handedly. It should be also noted that Rob Lucci is the strongest member of CP9 in history by far; with his Doriki at 4000, almost twice that of the second strongest member of CP9, Kaku's 2200. Franky himself noted that his strength is levels above the rest of CP9, and later remarked that, if it were not for Luffy, he was not sure how many of them would have been slaughtered. Lucci is the only person so far to single-handedly bring Luffy to the brink of death with nothing other than refined brute force.Rob Lucci ate the Neko Neko no Mi, Model: Leopard, a Zoan-class Devil Fruit which allows him to transform into a leopard and a giant leopard-human hybrid. As Zoan class Devil Fruits enhances physical capabilities the most, it is most favored by martial artists like Lucci. Also, being a carnivorous animal, Lucci is more bloodthirsty and predatory than a regular Zoan class user, proven when he mauled Luffy as an actual leopard.