Loving someone who never knew something about true love is difficult. It takes too much patience. I understand why the emperor acted like that. Most of the people who became twisted experienced the worst while they are growing up. How would you know love when in the first place you never experienced it? Every people is too cautious around him. There's no warmth. How would he know how to act with love? A twisted character who never experienced love is highly possible to become obsessive.