Still looking for a couple of HP lines. Pansy here could use a Gryffindor guy to write against, but I wouldn't say no to other characters either, though for romance it's het only. Willing to do gen lines as well!
I also write quite a number of other HP characters, so it might be easier to figure out what kind of line we'd be interested in before picking the characters. I like writing the characters in their 20's or even 30's, tend to stick to the Trio Era. For overall lines, I like to world build a lot, but tend to shy away from super-complicated AUs (like slave-aus, or timelines where Voldemort never existed or something--those tend to work better as games). Slice of life lines with some plot to them (i.e. maybe they're a Curse Breaker and magical Archaeologist and get involved in some Indiana Jones-esque shenanigans, idk). I love extrapolating HP book canon, and tend to ignore some of what JKR has added (pretty much all of Cursed Child and the Pottermore originals tbh).
The only pairings I won't write are Harry/Hermione, Hermione/Draco and Snape/anyone.