Ayuki is the demon of blood and nightmares. She is 599 years old. She beautiful girl with black hair, green eyes and cute red little horns on her head. She is sweet, brave, daring, cheeky, smart, cunning, kind, affectionate (but not in battle. In battle, she is a ruthless killer). Recently there was an invasion by a horde of demons. The people won with heavy losses. Ayuki survived and fell in love with the prince of humans. She secretly lives in his room in the castle. the church hates demons.