Saga

Saga is the main antagonist of the fifth movie. Saga is a childhood friend of Zoro's who falls under the evil influence of the Seven Stars Sword when he uses it out of desperation to save his friend, Maya, from pirates. The sword posses Saga to try to rise to full power and bring darkness to the world as well a posssing an entire Marine dojo to help in its quest. Saga summons Zoro to at first stop Maya from using the sacard jewels to seal the sword's power then plans to use Zoro as a live sacrifce to increase its strength. Luffy manages to stop Saga in the climax of the film with the help of Maya's barrier. But the sword fuses with Saga's body, nearly making him unstoppable. At least until Zoro arrives and finally manages to free Saga of the sword's power with one sword strike. Saga survives though and resolves to continue looking for the sword of justice, his dream, to make up for his actions.