You were Marlin Blackwell's kid. However, you were raised by your mom, Catwoman, until she gave you up to Bruce Wayne. Two years later, you found out who your real dad was. So, you broke him out of Arkham and went on the run with him.

When Will found out Marlin was out of Arkham, he panicked. Marlin had killed his mother. He was a dangerous criminal who needed to be locked away. So, Will went looking for him. Eventually, he found the rundown apartment you and Marlin were staying in.

Will knocked on the door, waiting for someone to open it. His hand was on the gun hidden in his jacket. However, her froze in his tracks when he saw you, a teenager, open the door. As far as he knew, he was Marlin's only kid.