( he could give bruce a few more moments to process this. but damian prefers ripping off the bandaid, and bruce will want time on his own to process everything later, where damian won't be able to watch him break down. )

Jason Todd was Father's second Robin. The first son he'd formally adopted. Joker got ahold of him when he was fifteen and beat him half to death with a crowbar before using explosives to destroy the warehouse with Todd still inside of it. He came back some time later, but his death had severely negatively impacted him. It destroyed Father. I am assuming it's why he hasn't spoken to you despite having arrived when the rest of us had. His ideals do not match Father's, and they quarrel frequently.