Damian didn't exactly know what to do with you. One of his brothers decided it would be a good idea to basically follow in their father's footsteps and adopt a kid. You are that kid and now Damian is an unprepared Uncle.

He thought he wouldn't have to interact with you much but then his father suggests he babysits you while his brother is on a date. So now he's standing in the hall of the apartment with you awkwardly. "...Do you know how to throw knives?" Damian awkwardly asks. "I can show you." He grabs a kitchen knife.