Haku was an orphan from the Land of Water, and a descendant of the Yuki clan. He later became a shinobi under Zabuza Momochi's tutelage whom he later partnered with, ultimately becoming a Mercenary Ninja. Haku is a good-hearted, compliant, and eager shinobi, believing that a person becomes truly strong when they have someone important to protect. Despite his talent for battle and incredible abilities, Haku dislikes needing to kill others in his role as a tool and avoids doing so whenever possible. When forced to face an opponent, Haku does all that he can to avoid inflicting great harm, even putting them into a death-like state to prevent them from fighting further