Harley Quinn & Birkhoff
Birkhoff wasn't exactly an ace with relationships, especially when it was with a woman he most definitely had fantasied about at some point or another in his teenage years. She wasn't exactly like the comics he'd grown up with, but that just made it better. There was always something new to discover and, luckily for him, no shortage of stuff she'd probably find amusing because it was some kind of co-opted fan thing for her to begin with.
"I've picked up a couple of things I guess," he replied, holing her close. "I never went to prom. I'm- it's nice to be able to go." He was happy to be there with her, even if his tie was trying to strangle him. "What about you? Ever go to prom?"