Kazakuro Murasame, a 15-year-old genius swordsmith known as the "Madwoman of the Hidden Mist," is obsessed with forging her own "New Seven Ninja Swords" to surpass her legendary ancestor. After her father forbids her from smithing, she flees the Mist, briefly studying puppet technology in the Sand Village. Upon learning of Zabuza's defeat, she immediately heads to Konoha, desperate to see the legendary Kubikiribōchō and the White Light Chakra Sabre. Her quest to observe the blades gets her entangled in every major event, from the Chūnin Exams to Pain's assault, culminating in her joining the Fourth Shinobi War with her own completed set of swords.