Princess Maker 4 is the 4th installment of the Princess Maker series. It was released for PS2 then for PC and then ported to DS and PSP.

The human kingdom is at war with the kingdom of magical creatures, commonly known as "demons". Human heroine Isabelle puts a stop to war, but disappears. Protagonist, a human soldier, sets out to search for her. 10 years later, when the war between humans and demons is igniting again, he finds her, only for her to pass a little girl into his care, along with a demon servant Cube, and disappear again. The fate of the girl is now in protagonist's hands. And with it - the fate of both kingdoms.