Ame-onna

Ame-onna (雨女, Literally meaning Rain Woman) was once a valued heirloom of a by the name Katsumi. According to the weapon's former owner, it has a rich history, filled with the heroic tales of those who wielded the blade before her. Upon her disappearance during the, which has recently been classified as "killed in action", the sword came into the ownership of Kaidan Nomura, Katsumi's significant other.

Origins
During the opening phases of the, Ame-onna was forged at the hands of a master smith in order to fill an order placed by the reigning. The story goes that he had a nephew who was an elite member of forces, and as such the Daimyō desired to outfit him with the best equipment possible for the upcoming fray. Over the course of the conflict, the Daimyō's nephew wielded Ame-onna with valor and bravely led many of his compatriots into successful battles. Unfortunately, he did not evade the sting of death and defeat forever. In the end, he and his squad were ambushed and decimated by an enemy squad of shinobi hailing from and Ame-onna was seized as a spoil of war. To say the least, he was a warrior of immense skill whose reputation was well-known amongst the nations; so much so that the shinobi who claimed Ameonna immediately recognized its former master and straightway considered the weapon highly valuable.

From that point forward, until the close of the war, the new owner of Ame-onna would serve his Village admirably. This shinobi would know great success on the field of battle and would be the culprit of several strategic victories for Konohagakure. When the war came to a close, this shinobi would enter into the service of the ANBU corps and serve directly under the reigning Hokage. Ameonna saw many successful, covert operations during this time. In the end, just like its former owner, the ANBU in question would go on to become a shinobi of great renown within his Village. Eventually, around the months leading up to the outbreak of the, Ame-onna would be passed down to the ANBU's son: a newly promoted Chūnin.

Unfortunately, the trend of valor would come a conclusion with this shinobi. When the Third Shinobi World War finally consumed all of the Five Great Nations, the inexperienced Chūnin was pitted against a squad of some of the finest members of forces. Ironically, the encounter took place as an ambush. A team of Konohagakure shinobi were sitting about the campfire, hearkening to the Chūnin's recounting of Ameonna's history. As he bragged, the Kirgakure shinobi moved into position and struck. Needless to say, he did not survive the encounter and Ame-onna was once again claimed as a spoil of war. However, unlike the ANBU who claimed it previously, this Kirigakure shinobi simply gifted the weapon to his young student: Katsumi.

Katsumi highly valued and cherished the gift from her teacher. Over the course of many years, she incorporated the blade into her combat style and became a rather deadly combatant. However, as aforementioned, Katsumi went missing during the turbulent Fourth Shinobi World War. While frantically searching for his beloved, Kaidan Nomura stumbled upon Ame-onna in the ruins left behind by the conflict.

Trivia

 * This weapon is named after the spirit "Ameonna", a seemingly benevolent spirit who brings rain to crops.