Hey, Ali here :) I've got these characters, and I can think of a few lines immediately.
Johnny (~ignosceredivina) is a fae who loooooves plants. All of his have just died due to someone else's incompetence so he'll need to replace them ASAP, but he's been in town for over a decade, and likely was/is a regular at the flower shop? He's been and gone a few times though, tends to travel for long periods so would have been very confused when he came back and the kid was different to how he left.
Celeste (~pythonissam) grew up in the town too, though she's a little older than he is, she didn't have many non-magical friends so maybe they knew each other?
As for my others: Fern's a fae that has just come to town recently as her currently-unplayed human that she's watching over has travelled to Duncaster, so she's getting the lay of the land.
Jinhae's (a vampire) been gone for a decade but has been on the NY side of Duncaster for a while as Arden's been there forever, too.
And Song is a nephillim but doesn't know it. He's just graduated college and is your typical starving artist xD