Yūgao Hyūga

is a Chūnin-level kunoichi from Yamagakure, as well as a member of the Yagyū Clan.

Background
Sometime shortly after the Samurai–Shinobi Civil War, Kazumi and her younger sister, Umi, were kidnapped by the Four Devas—a small faction of samurai—and held in Edo. Sometime later, while infiltrating the city of Edo, Saburō Uchiha, was charged with the retrieval of the two Yagyū girls. However, before entering the main prison, his chakra gives out mid-technique, revealing his presence to the enemy and forcing him into combat. His skills as an assassin easily made up for his loss of chakra, allowing him to fight off the prison guards and free the Yagyū girls. The samurai, nevertheless, stage a final stand, forcing the three to flee the prison. At the last moment, Umi activates her Explosion Release kekkei genkai, demolishing the prison even as Saburō leaps with them to safety.

Trivia

 * Kazumi's name is a corruption of the Kanji's true pronunciation. The Kanji used in her name (霞) is truly pronounced "kasumi" and translates to "mist".