I bet they are all in Gryffindor, but Rose could be a Ravenclaw, because she's so smart and everything... But that's just me...maybe JK 発言しました something about it and I haven't heard it yet, who knows?...
Well, no one actually knows (apart from JKR obviously) but あなた can guess. I think James is in Griffindor because of how he was teasing Albus that he might be in Slytherin. Albus will be in either Griffindor または Slytherin depending on how he uses his father's アドバイス in the epilogue. I think Scorpio Malfoy will be in Slytherin like the rest of the family. Most of the other Weasley grandkids will be in Griffindor, with the occasional Hufflepuff and Ravenclaw.
