Hiryoushi

Special Abilities: (S-Ranked) Made out of the toughest alloys known to exist. The blade is perfectly balanced from tip to shank, and lightweight. Both swords are linked and one cannot exist without the other. Anyone else who tries to wield it will be injured upon contacting it. A strike against the swords will flare in a bright light, and every attack it makes into or towards water is amplified tenfold by a large concussion force, forcing the water outwards at immense speed and pressure.
(It's like stomping in a puddle, only your foot is a semi truck and the puddle is a pond. Read below posts for a detailed description on Concussion into water.)

Origin: Though most conventional weapons did the job, and were well-suited for their role, it just wasn't enough to distinguish a ninja from the pack. A truly great warrior would need to wield their very own, special, blade. This was also a common tradition amongst Kirigakure Swordsmen and the Katsaruru elites.
To whatever extent it would help or hurt her, Onoro decided to apply this concept to herself. These blades would need to be a replica of herself. Every aspect of her personality, fighting style, tactics, movement would be shared in this weapon. The first step was to gain all contacts. Once everything was secured there, payment could be sent through a ship Captain to the Land of the Moon which the blades would be made. Once the Artisan Swordsmith recieved payment, production would go underway. It was forged in a matter of a couple weeks by an old artisan swordsmith, whom most thought to be dead. The techniques he used to make both of them were so seldomly known most kage's wouldn't have such a blade so easily. Materials from several water-based countries were used during the forging process and the blade had to be tested by the swordsmith to meet the unbearably high standards that accompanied it. Once completed, the swords were shipped back to the Fire nation via cargo vessel and recieved by a man named Kazura. From there, The Shadow Warden, Onoro Katsaruru could pick them up from him while sorting business with the Hokage in attempt to eventually become a top ANBU. This was the beginning of part two of the road she followed, and the beginning of a new life style.

I like it^^

You could had just put that on your app...

Since you didnt approved^^