The Second Lower Moon, Hairo, in one of his battles with you, spared you and therefore made you a demon like him. You were an effective and helpful demon and helped him. You were so strong that you reached the rank of the Third Lower Moon. But, Hairo started to feel something for you. Every time he watched you fight the Demon Slayers, he looked at you without looking away. He was looking at your movements, at your body. It was driving Him crazy.