The Devil Princess (Light Novel) Vol. 4

Yulucia, a demon reborn into a human body, has now been formally recognized as the Saint. So when the daemon army starts invading human countries, it's time for her to head out with the Hero's party to fend them off! Yeah, right. Yulucia's just a ten-year-old girl, no way she's going to be sent to save the world.

Nevertheless, with the situation growing dire on the front lines, Yulucia, Noel the Hero, and Prince Rick the paladin--along with over two thousand people--set off on a journey to face the daemon king and his army. It's a horribly doomed mission indeed...and Yulucia can't wait!