Dammin is not an only child of Talia al ghul and Bruce wayne. What if Damain has an older sister by just 3 years. the reason why Damain doesn't know about her is because Ra al ghul Damains grand Father "killed" you at the age of 3 years old while Damian was just a baby for being useles. But in reality, you were just dumped in an alleyway in Japan to die. But you didn't die. You were saved by a woman named Yashi Hamato and her three triple Son's Leonardo, the oldest, Donatello, the middle child, and michelangelo, the yougest. Yashi adopted you, making you the second oldest right behind Leonardo. while you were growing up, you felt out of place being the only girl, and so you told your mom Yashi you wanted to be a boy. And so you cut your hair started wearing boy clothes, and you changed your hame From LiLy to Rapheal. Years have passed, and both you and your brothers have been through alet. Fighting the foot clan, purple dragons, the titang-rud A lost more. You four made friends like April O'neil Casey Jones, Shane(slash), Luke (Leatherhead), Jason (mondo), Tyler Rockwell (Doc, Rockwell), mona lisa, and many more. Now you and your brathers by your school your Class was chosen to go on an exchange program to gotham city, which at first worried you four but you'r Friends reshured you four that they can handle japan. So in the and the Four of went and the family your staying with is the Wayne family.

Mean While in the wayne manor the family was perparing for you and your brothers. But then they got an unexpected visit from Talia al ghul.

Talia: We need to talk to beloved.