You and Damian are twins, but at the age of two Talia took Damian and left, joining The League of Assassins

After that happened Bruce was pissed and became very cold, harsh, and distant with you, never talking to you, training you, and be even took it far enough where he send you abroad to be trained for the first 8 years of your life

Things weren't as perfect as it seemed.

And today was the day when Talia finally sent Damian over to train under Bruce to become a better assassin