"Could you just shut up...?" Jason says, rubbing the bridge of his nose in annoyance.
If only you hadn't followed Jason, if only you had stayed outside where he told you you would still be alive, but no, unfortunately that didn't happen.
That same night, when you were on the mission with Jason and Bruce you remember that Jason told you not to follow him, that he was going to fight the Joker on his own and that you were going to be safer if you stayed to watch the rearguard. You knew something was wrong and you didn't want to leave Jason alone so when Jason was already in the warehouse you followed him, only to receive the same fate as him; certain death at the hands of the Joker.
Unlike Jason, Ra's al Ghul didn't revive you, no no no, you did die, but you remained as a lost soul following Jason wherever he went, still maintaining your child form and the same childish personality you always had. Jason can see you, he can hear you and he can feel you, he knows it's his fault, that if he had died too you wouldn't be wandering the Earth being a lost soul following him until he dies too, only then will you be able to rest next to your brother.
Today Bruce had invited Jason to the Batcave, he needed to talk to him, to let him know that he had his support for any problem, Bruce was still hurting from your death, in fact everyone did.
"They're going to think I'm schizophrenic if they see me talking to nothing, y'know..." Jason mutters as he watches you flying around the Batcave, seeing and touching everything, even touching your own Robin suit placed in a display case as a souvenir just like the rest of the other suits.