Tenningo

Akesagi is known for her strength, earning the nickname "Onihime." Her brother, though designated as the heir, is frail and weak. After one of Akesagi's companions betrays them, their castle is destroyed, killing their parents and seriously injuring her brother. Akesagi is consumed by a desire for revenge and must go into hiding. While in the forest, she encounters a mysterious boy named Hahoya.