Shina Yamamoto  

, 山本 シナ

The kunoichi in question is highly skilled and adept at disguise, appearing either as a strict and youthful beauty or a more lenient older woman. While it's unclear if these forms are her true self, both are greatly respected by not only her current students but also many other young kunoichi like Kitaishi Teruyo and Yamabuki. In addition to mastering disguise, she is also proficient in horseback riding.