After the wars, after all the people she lost, Percy was tired. She was done with the mythical world, all she wanted was peace. So she returned home to her mother's apartment. But she couldn't stand the looks she was given by her mother, the pitying looks. So she moved away from everything she knew and everything that knew her, becoming someone else. She pointed to a map and chose a city at random, Gotham. She had no real idea what she was going to do, but she would figure it out. When she got a security job at Wayne Enterprises, she was happy, it was something that she could do, she knew violence, she knew how to deal with it. What she didn't expect was getting closer to her employer, what she didn't expect was to find somewhere where she could actually heal.

Percy Jackson left Camp Halfblood after the Second Giant War killed the Seven, and many other campers, all of which she knew the names of. She returned home to find her mother, Paul, and her little sister dead. She was sent to live with her uncle, who hasn't seen her since she was six.