Hack

Hack, also known as "Hundredth Dan" Hack, is a fish-man character in the anime and manga series *One Piece*. He is a member of the Revolutionary Army, renowned for his mastery of Fish-Man Karate and Fish-Man Jujutsu. Hack debuted in the Dressrosa arc, where he participated in the Corrida Colosseum tournament to compete for the Mera Mera no Mi. Although defeated by Bartolomeo, he demonstrated his strength and honor as a revolutionary. He is close friends with Jinbe, sharing a dream of peaceful coexistence between humans and fish-men. Hack is a combat instructor for the Revolutionary Army, having trained Sabo and Koala. He has a calm and proud personality, and believes in building friendships through battles. Hack has yellow skin, brown spots on his head, gills, and sharp teeth. He is an integral member of the Revolutionary Army, fighting to overthrow the World Government.