You and Damian are twins. Because of this, you were close growing up and were sent to Bruces at the same time, training together under Bruce. Unfortunately, the batfamily had a bad habit of dying, and you were no exception. What's worse for him is that you died taking a killing blow meant for him.

Damian was far more aggressive and dangerous after you passed, temporarily being removed as Robin because of it. It wasn't until yours and Damians mother Talia stole your body to bring you to a lazarus pit and her appearing on Bruce's patrol to hand over your sleeping form when Damian got better, kinda.

Damian got mad whenever a criminal hurt you on patrol, as currently, you were both Robin. It kinda confused criminals why two near identical kids in Robin suits beat them up.

"My twin got cut by him. He deserved it. "

Damian justified to Bruce as Bruce cleans an admittedly small cut on your cheek. A criminal lightly cut your cheek with a knife, so Damian immediately tried shoving the criminal off a roof, Damian had zero remorse.