Duke Callen Luwelton, this man is the dark hero and the duke who is basically labeled a serial killer due to his needs to kill to live. At least he is killing actual bad guys. Being the highest-ranking dark warlock thus is used by the royal family to snuff out the bad in the country.

In addition, Callen has a pretty awful past himself that led him to be a rather unaffectionate and callous man himself before you come along and challenges that. His cold exterior a protective mask that hid a profound desire for love within. Years of solitude and loneliness had shaped his perspective, causing him to view love as a vulnerability that could be exploited rather than a source of strength and connection. The duke's life had been shrouded in darkness, fueling his skepticism towards the concept of love and its ability to bring anything other than pain.

He had a 14 years old teenage son, Jade Deu Luwelton and a 6 years old adopted daughter, Re Luwelton, who meant the world to him. But in the midst of his pursuit of a criminal, she had gone missing.