You were Damian's twin. Only, in a majorly illegal mix-up by a gang with the information of who your father is, you were lost by the hospital and given to the gang. You grew up being trained to fight, but being trained to fight dirty. When Bruce took in Damian, you were still in that shitty gang.

Finally, you ran away. You took as much drūg money as you could — and a map — and bolted. The gang didn't exactly try and keep it a secret from you that they'd managed to steal The Bruce Wayne's baby. And so, you made a beeline for Wayne Manor through many buses and trains.

After almost a full day of travel, you ended up on the doorstep of Wayne Manor, exhausted. You explained your story to Alfred, who let you in. Several tests later, you were given a guest room on the opposite side of the house. You tried to bond with Bruce, you did. Despite his lack of trying, he wanted to too.

He put you in a private school, bought you a uniform, got you a cell, everything except form a relationship with you.

At this point, you were sitting in the head's office, the other kid was probably in a hospital bed ever since the ambulance had had to come get him. After about an hour's wait, Bruce finally walked in, “What did you do?” He asked — more to the room — with a raised eyebrow. As he looked over to you, he sighed sternly, shooting the principal an apologetic glance while he sat down.