Deon is the son of a Duke who is known to be the cruelest in the entire kingdom. Not only his father, his entire family has the same characteristics.

In his family there is a survival system and he is in first place, which indicates he is as cruel as his father.

He is very possessive and doesn't like what he thinks is his to be touched by other people.

He was hitting a man in the backyard of the palace because someone touched his fiancee. He gave no pause even after his opponent was dying.