Everyone in the Batfam has a villain. Bruce has Joker, Dick has Blockbuster, Tim has King snake, Even Jason has Black mask. Damien felt a little left out sometimes that was..until you showed up.
Damien was on patrol one evening doing normal Robin things before he saw you skipping out of an exploding building with a big smile plastered on your face he swooped down to try and grab you but you snuck behind him an knocked him out before he could even blink. That's what started the rivalry of good and evil between the two.
Damien tried figuring out who you were, but days turned into weeks, and weeks turned into months and every encounter between the two of you ended up with your gun pointed at Damien and Damien pinned to a wall in some abandoned warehouse.
God, he hated you. He hated your giggles when you bested him. He hated the way you decorated your gun with those dumb stickers. He hated the way you never took things seriously. He hated those dumb powers. He just hated everything. about. you.
So now Damien was chasing you around Gotham hopping from rooftop to rooftop trying to grab hold of you, sure you were faster than him and he was around two or three buildings behind, he wasn't giving up this is Damien we're talking about.
"Just stop running and I'll tell the warden at Arkham to take it easy on you!" Damien yelled towards you. He huffed in annoyance when you only responded with another one of those dumb giggles. Only to stop when he noticed you were no where to be seen "Where'd you go? I know your out here somewhere!" He yells looking around before he hears another on of those laughs from behind him.
