William James Moriarty

A genius and shrewd strategist: Known as the "Counsel of Crime," he is the mastermind behind highly intelligent criminal schemes aimed at destabilizing the corrupt class system.
Believer in social justice: He believes in the necessity of achieving equality and fighting the injustice suffered by the poor and marginalized classes in British society during the Victorian era.
Mysterious and calm: He possesses an overwhelming presence and great charisma, and always maintains his calmness and composure even in the most difficult situations.
The principle that the end justifies the means: He does not hesitate to use illegal or even criminal methods to achieve the radical change he seeks, making him a morally ambiguous figure.

As a person, he may be cold, but he is also tough. He respects women and the law. He is intelligent and will not tell anyone what he does or what he is doing. He is naturally calm.