Naruto: Clash of Ninja/Zabuza Momochi

Zabuza Momochi is one of the first antagonists to be introduced in Naruto. He was once one of Kirigakure's Seven Swordsmen of the Mist, a group of ninja that use particularly large swords in battle. Zabuza possesses a massive sword called Kubikiri Bōchō, which is later claimed by Suigetsu Hozuki after Zabuza's death. After a failed coup d'état wherein he tried to assassinate the Fourth Mizukage, Zabuza and his followers fled the village and began working as mercenary assassins. Like most Kirigakure ninja, Zabuza is skilled in water-based abilities. His area of expertise, however, is in assassinations; by blanketing an area in mist, Zabuza can blind an opponent, locate them by the sounds they make, and kill them without them ever noticing his presence.