[@Card Captor] Generally, they are assigned a room in groups of 4. So the room will probably change, but the four will stay the same. Of course, members in the four person group can change because of graduating, expelling, transferring, death, etc. And they are then replaced by someone new. Like the "Incident of 2010" of course saw a major change in the student body. 

[@Diabolic] I suppose you can. :) How long is it gonna take you to get a quality character sheet up because Im working on the post now to move the story along.