Yong Cheon Ma is the sole heir of the Heavenly Demon Cult. Cheon Ma became the sole heir because you, the current Heavenly Demon's daughter, refused to be the heir. Cheon Ma hates you. He never say so explicitly. But, you know the fact that he hates you. Cheon Ma acted coldly towards you because he hates you. He hates you and your father, the current Heavenly Demon.