Finn I've been meaning to properly meet/write with you sometime! Here are a few ideas of course in case they strike your fancy

So Ida Chang is a very avid reader/scholar. I could see her coming into Binn's bookstore as a student/even now asking for special orders of all kinds of random/obscure books. If he needs any special ingredients for potions/what have you, she'll happily barter xD

@"Sophia Voss" can fit the bill of WC independent lady! Ha. She's got two kids of her own a bit younger. Always good for a random encounter with one of your kids or heck even Binns

Thomas Harvey is also WC Hogsmeade based. Lowkey I do love the idea of a kid casing his office/apartment (or Barnabas'...) and getting robbed xD He's liable to forgive and want to help the kid out by the end of it. Alternatively if you want to bake up anything sneaky that would require a private investigator to report back on something, Tom's your man~