Cassandra Simmons was born in 1982, in Gotham City to two servants who worked for the Muir Family. Her mother was pregnant at the same time that Eleanor Muir was pregnant with Isaiah Muir, and she was born a few weeks after Isaiah. She grew up in the Muir mansion, her education paid for by the Muir as thanks for the years of service that her parents had given to them. In addition ot her education, Hugh Muir paid for her to attend the same martial arts classes that Isaiah took in the house, though he didn't realize then the headache that the two children would cause.