Shunshin no Naruto

Chapter 10: the Demon of the Mist, Zabuza Momochi

With that said, Team 7, and Tazuna continue their journey to the Land of Waves. And, after a short boat ride, all five of them are in the Land of Waves.

As the journey went on, Naruto threw a kunai into a bush, scaring a snow rabbit. Which is weirding out Kakashi, as he thinks, "That rabbit shouldn't have white fur this time of year, it's fur should be brown... Wait, what is that ringing?" Kakashi then yells, "DUCK!"

As his Genin flung themselves to the ground, Kakashi grabbed Tazuna, and did the same thing. A giant-ass sword then flies over their heads, and gets lodged into a tree. A tall man, appears, standing on the blade, backwards. He then looks back at the Konoha Shinobi. The man asks, "Sharingan no Kakashi, who knew you'd be babysitting some pathetic Genin?"
Kakashi says, "Zabuza Momochi, Kirigakure no Kijin (Demon of the Mist)."

Zabuza Momochi, given the name of Kirigakure no Kijin (Demon of the Hidden Mist). He was a former member of the Seven Ninja Swordsman of the Mist, and a former ANBU-captain. Now he is a missing-nin, after trying to assassinate the Yondaime Mizukage Yagura.

Zabuza is aggressive, arrogant, cruel, cold and ambitious, willing to become Gatō's thug to gain enough funds to start a second coup d'etat on the Mizukage, and kill anyone who stood in his path, including plotting to kill Gatō once he had received enough funds from him. His reputation for cruelty and ruthlessness began as a child where he killed every single candidate in Kirigakure's Academy, earning him the moniker of "Demon of the Hidden Mist" (霧隠れの鬼人).

He willingly uses his own men and others as pawns to fulfil his ambitions, as he raised Haku to be an efficient tool to be discarded when he had no use to exploit; although unlike future antagonists, he was blunt about the purpose that his recruits were needed for, forgoing any form of manipulation by pretending to be benevolent to inspire loyalty. This corresponds with his cynical view of the world, which only consists of the used and the users, as well as viewing shinobi to be nothing more than tools. Despite himself, Zabuza grew to care deeply for Haku and viewed him to be far more than a tool.

He is an observant adversary who is able to analyse his opponent's techniques after seeing it once, but becomes overconfident if he sees the technique as useless. Despite his ruthlessness, Zabuza was possessed of a softer side that he himself was largely unaware of.

Zabuza was a tall and noticeably muscular man with light grayish skin, short spiky black hair, dark brown eyes, and small eyebrows. He was normally seen wearing bandages like a mask over the bottom half of his face. Under his mask, he had a relatively narrow jawline and jagged-teeth, a trait he shared with his fellow Swordsmen. He wore his hitai-ate sideways on his head.

He is seen shirtless, with his chest only covered by a belt to which he attached his Kubikiribōchō, the giant-ass sword. Zabuza is also seen wearing baggy pants with the striped pattern typical of Kirigakure and mimetic wrist-warmers extending up to his elbows, with matching leg-warmers.

Zabuza chuckled, as he says, "You know of me? I'm honored."

Kakashi then asks, "Why are you here?"

Zabuza answers, "Give me the old man. You, and your Genin can live. What's it going to be?"

Kakashi answers, "That's funny, as we are here to protect Tazuna, so... We will stay."

The Hatake then pulls his hitai-ate from over left eye, revealing his Sharingan. Zabuza then says, "The Sharingan? Never thought I'd see it so soon, but it has weaknesses like... Kirigakure no Jutsu (Hiding in Mist Technique)!" Blinding mist then covers the area.

Zabuza hiding then the mist, then goes to attack Tazuna, but Naruto blocks the strike with his tanto, and Sharingan out. Momochi then says, "Two Sharingan? Boy, am I lucky!"