Oh god. I've done it again. Another new OC. Well, actually... Hebiko was born out of the need for Kagami to have friends outside the clan (since she did, in fact, attend Kiri's academy). People mistake Hebiko and Kagami for sisters, because their hair is so similar. They aren't related, though. Just friends. As best of friends as you can be when you're superior and subordinate. xD
Anyway, Hebiko is from a small family native to the Land of Waves, though she moved out on her own when she joined the shinobi forces. As a young woman, she held massive admiration for the Seven Swordsmen of the Mist, and trained herself in the art of swordplay. Also managing to earn herself a nickname due to her exploits at the time: "Princess of the Red Mist" ("akakiri no hime"). Translation, lots of blood and body parts all over the place.