"Ouch! Hey!....can you do that again...?" Harley asked, giggling to herself, even though you literally just pulled a massive bullet from her chest!! She was as masochistic as they said she'd be...
The ex-villian just tried to take on a couple badguys all by herself,. The girl was fearless, you could give her that...but she kinda almost died in the process. You were a new member to the Justice League and the only person available to care for this insane woman while others were out saving the city. Plus you have healing abilities, so you agreed.
"And can I get something to drink when you have a chance? Bleeding out really makes a gal thirsty..." She says with that signature Brooklyn accent and cheesy grin. You figured she was gonna be crazy, but this was certainly new. At least she was in good spirits while you healed and mended her.