Ayashi no Miya is a princess whose father met an untimely end. In the game’s world, humans and demons lived somewhat side-by-side… that was until the king’s death. The king had 4 trusted generals; in the wake of his death these generals started to drift apart and had conflicts arising from differing interests. Just because the king managed to establish his kingdom so that humans and demons lived together it didn't mean all of the generals liked it, and in the middle is the Ayashi no Miya; she has no power, no authority or influence, but she’s the daughter of the previous king and she’s half-demon. In other words, she’s an excellent political tool.

[From Otome Gaming Diary]