AboutSuigetsu was born in Kirigakure and was reputed alongside his brother, Mangetsu, to be the incarnation of the demon Zabuza Momochi. He and Mangetsu aspired to inherit the title of Seven Ninja Swordsmen of the Mist. This acted as their motivation to finish cruel missions day by day. While Mangetsu eventually became one of the seven, Suigetsu's motivation was shattered with the premature death of his brother, and he changed his ambition to "collecting all of the swords", in order to retrieve all seven original blades that has been passed down by the swordsmen, so that he could rebuild the group and become its leader.
With the humiliation of being captured and experimented on by Orochimaru and Kabuto Yakushi, his ambition was put on hold. Through these experiments, Kabuto at least, was able to replicate Suigetsu's unique secret ability to liquefy himself at will. At some point in the past, he had to fight with Jūgo.