Haku

Haku is a missing-nin from Kirigakure.

Childhood
Haku was a resident of the Water Country. As a child, he was raised in a peasant's village with his mother and father. One day, he discovered that he had the ability to manipulate water. However, his discovery led to nothing more than a harsh slap from his mother. Haku was unaware that he was the bearer of a kekkei genkai- the ability to create ice. His mother, too, possessed this kekkei genkai. The civil war in the Water Country led to both sides seeking those of a kekkei genkai and the resulting battle led to mass destruction. For this reason, those without kekkei genkai were prosecuted and killed.

Revision of Life
Haku’s father had witnessed his son using the power and in a prejudiced fear and rage, killed his wife and then came for Haku. Cornered in his own house by his own father, Haku acted in self-defense and killed him. With nothing left, Haku lived as a street rat for a while until he encountered the missing-nin Zabuza Momoichi. Instead of rejecting Haku like others did, Zabuza took him with him. Haku was then taught ninjutsu by Zabuza and became just as dangerous as the swordsman, if not moreso. He grew close to Zabuza, thinking of him as a father.

Land of Waves arc
During Team 7's mission to the Land of Waves, Haku appeared before them, giving the impression of being sent to kill Zabuza. In reality, he was there to rescue him. Prior to his defeat, Haku's purpose in life had been to fight for and protect Zabuza and his dream of ruling over the Land of Water. His defeat made him feel useless and weak. Having lost his only purpose in life, he wanted death's cold embrace. But before Naruto could reluctantly kill Haku as asked by the boy, Haku used Crystal Ice Mirrors and senbon to release Zabuza from Kakashi's summoned dogs and take the Lightning Blade strike. Haku's selfless sacrifice allowed Zabuza to avoid death. Despite Haku's sacrifice, Zabuza was eventually defeated by Kakashi and then killed by the combined efforts of Gato's hired thugs before he managed to kill Gato. In death, Zabuza thought about his ways in treating Haku and was finally able to understand his love for him. Before Zabuza died, he whispered in Haku's now deaf ear that he wished he could go where Haku was going to in the afterlife.

Revival
Nearly three years after his death, Haku's grave was struck by a bolt of lightning. He awoke, six feet underground. Using a water jutsu, he carved his way out of the grave. He looked beside him, expecting to see other graves... but there was nothing save for his own grave's cross and a small slot next to another mound of ground. He realized that Zabuza's sword was once there, looking at the shape of the hole, and decided to make it his goal to recover Zabuza's sword. He traveled the lands, looking for the thief, but to no avail.

Ninjutsu

 * Crystal Ice Mirrors
 * Crstal Ice Mirror Trap
 * Ice Formation
 * One-Thousand Needles of Death
 * Water Style: Water Snake Jutsu
 * Wind Style: Hair Wind

Genjutsu

 * Ice Dragon's Roar

Taijutsu

 * Acupuncture
 * Pulse Acupuncture