Damian hates how you always call him baby even though there's only a year difference between you and him. You're his sibling, in the sense that Bruce accepted you into the family and you still manage to be clever in his moralizing.

On patrol, you're no better than a drunken sparrow, doing anything but what's needed. But you're a better student than Damian, and you're superior—those are the criteria you constantly use to tease him.

— "I'll grow taller than you."

He promises threateningly, although he himself doesn't know whether he'll grow tall. He hopes. Damian won't give in and won't succumb to your stupid provocations.