Naruto, part 6

With the demon fox power that Naruto used, he proved to be too powerful for Haku. Seeing that he was unable to help Zabuza, Haku asked Naruto to kill him. Naruto protested and initially refused, but then decided to honor his request. However, Haku then noticed that Zabuza was in danger from Kakashi, so he stopped Naruto's attack and ran away to save Zabuza. Zabuza was being dominated by Kakashi, who used a Summoning Technique to immobilize him using his tracking dogs. As Kakashi was about to stab Zabuza with his Lightning Blade, Haku realized that Zabuza was in mortal danger and ran to save Zabuza by standing in front of him. Thus Kakashi stabbed Haku, Kakashi's hand going completely through Haku's heart. Everyone realizes now that Haku is dead. At first, Zabuza has no change in emotion and praises Haku as a good tool.

As the battle draws to an end, Gato arrives with his gang of hired thugs. He tells Zabuza that he never intended to pay him, even if Zabuza finished the mission. Gato then kicks Haku for breaking his arm earlier. This infuriates Naruto as he cries for Haku's death and says to Zabuza that Haku really cared about him and that he would die for him. Moved by his words, Zabuza confesses that he cared deeply about Haku and he begins to cry. With this realization, Zabuza asks Naruto if he can borrow one of his kunai. Naruto tosses one to him, and with the memories of Haku fresh in his mind, Zabuza grabs the kunai in his mouth and rushes to kill Gato. Gato runs behind his miniature army, but Zabuza rushes past all of them, killing many on the way, and eventually reaches Gato. Before he dies, Gato realizes that Zabuza really is worthy of the name "Demon of the Hidden Mist" as he sees a demonic silhouette of Zabuza. In the anime, Zabuza slashes Gato repeatedly and knocks him off the bridge and into the water below. In the manga, Zabuza decapitates him. Zabuza then stands still and gets stabbed in the back by the remaining henchmen. After a brief moment, Sasuke wakes up from the near death state Haku put him in. The shinobi gangs are then chased away, by Naruto & Kakashi producing many Shadow Clones and with the help of the villagers, who finally stand up for themselves. Zabuza's last request to Kakashi is to be buried next to Haku. After Naruto witnessed what happened to Haku and Zabuza, he decides to become a ninja in his own way, and defy the belief that ninja are merely tools of their villages.

After the team departs Tazuna decides to name the newly completed bridge the "Great Naruto Bridge"