Naruto Shippuden the Movie: The Lost Tower: Sāra

Sāra was born to Sēramu, the Queen of Rōran. When she was a child, her mother was approached by a man called Anrokuzan who convinced her to use the power of the Ryūmyaku, an ancient chakra flow deep underground Rōran, to build huge towers in the kingdom. When Sēramu found out that Anrokuzan was only using her for his own purposes, he murdered her secretly by stabbing her in the back. Sāra became the Queen in her mother's place, unaware that Anrokuzan was using her as a puppet Queen.