No problem! <3 I'm sure we'll chat on discord before long - don't worry!
I definitely think there had to be a period where she was a) exasperated by him and b) didn't trust him over the snape thing. So we could say they were friendly and then cold with the Shrieking Shack thing happening, if that makes sense. And now closer to the end of Hogwarts maybe getting closer? Happy to have that be a thing in game like you said!
Just looking at your app, I feel like she's exactly the sort of witch Sirius WANTS to know.