Sin was a love child to two made vampires (Meaning they were bitten not born.). Her mother's name is Lyicane Caan but she thought it would be better if Sin had a diffrent last name so 's husband wouldnt know and wouldn't think of it. So Sin was released into the world as a 'Traveling Agent'. She is a good fighter although she does cause Renesmee's death. To replace the name Renesmee in the book of life, located in the house of life Sin had a daughter named Renesmee Van 'Deuu. Her plan did work but Renesmee was a human-vampire hybrid like Renesmee Cullen was.