We should totally thread! I'm not sure what she makes of Bastian, either. If there were ever Overtures, she would have shut them down right quick, but if she's so far managed to stuff him in the Classmate Zone, she's probably friendly enough to him. And, hey, didn't break up the party. So. Yes. Threading should happen!
That would be so precious. She would be so incredibly bewildered the first time he did that, like...really? Home for Christmas/Thanksgiving/whatevs? I THINK WE SHOULD DO THIS THING. She needs friends and definitely needs another example of how families can be. And such.
I think they could be friends! They've probably known each other a while, really, considering Sibyl is Rowan's roomie and Sibyl and Natalie have been on the Quidditch team for the last couple of years. XD Plus, they really do have a lot in common, so I feel like they could have easily become friends. Natalie can give Rowan extra guitar pointers, maybe?