Maria DeLuca & Sara Lance
Flirting was pretty much as common as breathing for Sara. "So, Maria DeLuca, how come I haven't met you yet?" she asked. "You must not have been in town very long. Either that or I'm doing a very bad job of socializing."
To be fair, most of her socializing was at Verdant, so if Maria didn't visit, that would probably do it. And even if she did, if Sara was otherwise occupied, she could have missed her.