Moriarty

The boy who would come to be known as "Moriarty" lived in an orphanage with his sick brother Louis, with his immense intelligence and charisma he would help people and acted as a leader of sorts to the other children. He eventually met the eldest Moriarty child Albert James Moriarty, who would often visit the orphanage to help the children, after Albert found out about the future Moriarty's goal to make everyone in Britain equal, he promised him all of his power and had his father adopt him and Louis.

Alongside Louis and Albert, Moriarty critically wounded his other adoptive brother William James Moriarty before burning him to death alongside the rest of the Moriarty household, with Moriarty proceeding to take his name as his own.

13 years later, William would become a Professor of Mathematics and lectures students at a university but on the side is a private consultant, taking cases involving cruel nobles as part of his masterplan of taking down the entire class system.

He is joined on this venture by his younger brother Louis who on the outside works on the Moriarty family's house affairs but is also investigating incidents involving the targeted nobles, Albert through his military connections and his high ranking position of a secret government intelligence organization known as MI6 uses his resources to assist Williams in his plans. William also enlisted two other individuals to his cause, Sebastian Moran a former soldier who according to the government is officially "Killed In Action" during the British army's campaigns in Afghanistan and Fred Porlock, a young man who specializes in espionage and information gathering.

During his schemes, he crosses path with Sherlock Holmes, a consulting detective who resides at 221B Baker Street and who is assisted in his cases by a medical doctor, John H. Watson who writes about Sherlock's adventures for the Strand Magazine under the pseudonym "Conan Doyle".