Maboroshi-en no Shiro no Navin

A 13-year-old girl named Navin lived in a mountain village until it was destroyed by an invading army led by Prince Lucian. Her friends were taken as slaves, her mother killed in front of her, and her home burned. Captured by Lucian, her mother’s enemy, Navin is forced to pledge allegiance to him. She works closely with him, not out of loyalty, but with the intent to kill him. The two form a master-servant bond driven by her desire for revenge.