Zabuza Momochi was a missing-nin from Kirigakure. A Water-user and a sword-user, Zabuza was a very vicious battler, preferring more direct attacks than deception, along with strong taijutsu skill. However, despite Zabuza's aggressive nature, he had been shown to be a crafty ninja with enough skill to kill opponents through zero visibility, capable of misdirecting his opponent.

Haku was a villager from the Land of Water. He later became a Ninja after meeting Zabuza Momochi. Haku had the kekkei genkai ability of Ice Release, which allowed him to control both water release and wind release.