It's a tie between Gryffindor and Ravenclaw. Brilliant and clever, yet also bold and daring. Which do you think he would choose?
I think Rose is a great example of the good and loyal hearts of the Hufflepuffs. A case could also be made for her in Gryffindor, of course, but I think she really is a sweet Hufflepuff at heart.
Gryffindor. Nuff said.
Ravenclaw. She's by far the most intellectual of the companions and definitely belongs here.
I don't think there is any doubt that Donna belongs in Gryffindor!
Even without the Weasley-red hair, Amy is obviously in Gryffindor.
Hufflepuff. How could you put him anywhere else? He's like Cedric Diggory's even more awesome brother.
Gryffindor seems the obvious choice, yet I think Ravenclaw has a hold on our River as well. And who knows what seeds of Slytherin we have yet to discover?
...and don't worry. It's obvious that Slytherin would have been the most populated house, what with the Master and the Daleks and all those Cybermen...