billy and mary as twin robins?
Billy: *checking out his costume* “Uh… I don’t like this Mr Batman Sir.”
Billy is wearing a costume similar to Dick and Jason’s except with shorts instead of tighty-whiteys. Mary is wearing a costume similar to Stephanie’s.
Mary: “Yeah, by the way, is this costume used?”
Spoiler: “Yes, and you look adorable!” *taking like five hundred pictures*
Robin!Damian: “Father, why exactly do we need the extra, unneeded help?”
Batman: “Don’t worry about it, Robin.” *pushes him towards Billy and Mary* “Now say cheese.”
After Bruce took a singular photo, he set them and Damian loose.
Batman: “Robins, since there are now three of you, you may go as a group.”
Robin!Damian: “I don’t have to accompany you, father?”
Batman: “No. Now go on. Stop crime. Watch your sibli— I mean, watch your partners, Robin.”
Robin!Damian: “He was talking to me…” *starts walking off*
Mary and Billy: *follow after him*
Billy: *whispering to Mary* “What was that stutter from Mr Batman Sir?”
Later, all three of them stood on a rooftop. Mary and Billy didn’t really know their way around Gotham nor know much about its rogues so they just let Robin take the reins of their little trio.
Robin!Damian: “Alright you both, this is a standard mugging. You both take down one man while I take the other.”
Robin!Damian: *already took his guy down*
Mary and Billy: *stomping their guy out*
Mary and Billy: *still stomping their guy out*
Mary and Billy: *continue stomping*
Mary and Billy: *both stop*
Robin!Damian: “Tie him up and move on.”
Mary and Billy: “Yes Robin!” *salute*
They mostly handled petty crimes due to Damian thinking Billy and Mary were untrained. Which, they were, in the normal forms. Damian doesn’t know that either of them are Marvels. They ended the night with a scraped knee on Billy’s side (he fumbled some parkour) and a little scratch on one of Mary’s arms. (Some guy pulled a knife and nicked her, it wasn’t a deep one.) Back at the cave, they had some cookies from Alfred and parted ways.