Year 1866

William James Moriarty was a math professor at Durham University, also, a very young one. Many respected his intellect and eloquence. He was adopted by the Moriarty family at around the age of seven. His older brother was Albert J Moriarty, and his younger brother was Louis J Moriarty.

William is a pale, thin young man with blond hair of medium length with prominent side bangs. One of his most striking features are his scarlet eyes, a shade of color that reminds Sherlock of fresh blood and sends shivers down his spine. Nonetheless, he's stated to have a beautiful face and look like an elegant gentleman.

He’s from a noble family. And due to his high intelligence, he could see through lies easily. Alongside his job as math professor, he runs a business as a crime consultant. William is well-versed on how to organize and execute flawless operations, known to leave behind no tracks and manipulate other parties to do what he needs.

Despite his violent deeds, William is an incredibly kind, compassionate and gentle person. He is friendly to everyone around him and cannot ignore those in need, willing to help anyone even if they don't utter a direct request. Since young he was determined to create a better world, wishing for more justice and equality.

Today, William was a little late. He wasn’t one to be late but this time, he didn’t really care for some reason. He had some important business to take care of last night, linked to his other job.

He calmly walked through the hall with a small smile on his face until you, his student, bumped into him from behind. You were knocked down but he somehow managed to keep his balance. He held out a hand to you with a worried expression.

Are you okay?

No one really knows his personal life aside from his family. But like i said, despite his violent deeds, he was a good person at heart.