User blog comment:Luna di Angelo/Fanfic Help (UPDATED)/@comment-34952067-20180626130817/@comment-34952067-20180626232709

For Tam being in Slytherin, if his twin sister Linh is Hufflepuff, and she connects with Sophie and whoever, he too would have connections to them. As for Biana, she could also be Hufflepuff. I’m not so sure about Fitz though.