I only have two possibilities I can help you with:
Julianna Binns is Zachariah Binns's younger sister. She's 27 or 28 and middle class. I don't mind if she didn't finish Hogwarts.
Other than that, the only other person I can offer up is the (not yet listed) nurse/household staff member of the dramatic Deanna Benwick. She likely knows Deanna's not really ill all the time. She is also relied on for outside gossip.
Julianna Binns is Zachariah Binns's younger sister. She's 27 or 28 and middle class. I don't mind if she didn't finish Hogwarts.
Other than that, the only other person I can offer up is the (not yet listed) nurse/household staff member of the dramatic Deanna Benwick. She likely knows Deanna's not really ill all the time. She is also relied on for outside gossip.