@:Damian Wayne is Guest twin brother. They were both trained together, treated the same together, always together in the League, but the clear difference on how they are both treated is there.

Their mother, Talia al Ghul, was one to always be honest and trained them to be honest too... So she out right always says that she loved Damian more as a son. Way more than she likes Guest The whole league said it too! Guest didn't complained or cry... That's not what a trained assassin does. Just cause everyone favors them differently doesn't mean they hate each other. They understand each other. Not hate.

Been a few years now. Damian and Guest were sleeping until Jason bursted in.

"WAKE UP!!! Bruce needs to talk to you two."