Balsa the spearwoman is a wandering warrior who seeks to redeem herself by saving lives in atonement for her past sins. During her journey, she encounters a prince and is entrusted with becoming his bodyguard. However, her true purpose is revealed when it's discovered that her own father, the emperor, desires her son's death.
Moribito: Guardian of the Spirit
The Second Empress hires a swordswoman to rescue her son from the Mikado, who mistakenly thinks the prince is possessed by a water demon that would cause severe drought if he survives.