Spectral Force

Spectral Force (スペクトラルフォース) is a Japanese game franchise developed by Idea Factory where the first game was released for Playstation on October 9, 1997. It produced 2 OVAs, one manga and a novel.

Plot
In a time when demons rule the world and mankind seeks freedom, human rebels gain control of the demon-slaying sword Tenmaken and attempt to assassinate the Demon King Janus. To preserve the sovereignty of her homeland, the half-human, half-demon Princess Hiro must overcome her deep hatred of the humans or face a war that will ravage the entire world!