Upon having the princess under his control, the king had achieved a great goal and his next target was getting the red dragon and for that, he was planning to use the princess but not just yet.
No one really knew what the king wanted from them but what they did know was that whatever it was, it was going to be the end of the things they love and care about, he was no hero-king but a villainous one that cared about no one except himself.
He was selfish and loved to show people what he can do with his powers which made people wish he never had them.
Before the king married the queen everyone knew he was arrogant but he was not evil.. he loved to show off and play better than everyone else and what happened that turned him into a psycho that no one knew.
The king's father spiled him a lot growing up and he always got what he wanted except the one woman he truly cared about.