The Queen of Sorrows is the title given to the wife of the King of Pain. She has powers fit for her position and her key duty is to give birth to either a Prince or Princess of Pain. With her death, her title is passed on to a female kin.
During 1481, Roderick Halliwell was looking for a wife, and eventually found Katherine Wyatt, the youngest daughter of a minor nobleman. After a lot of struggle, the couple was married at Westminster Abbey. Shortly after the wedding, Roderick decided to give her a title and named her Queen of Sorrows.