Ryoji shakes his head. "It's ok! My roommate's never around, you can stay as long as you want." He doesn't mind company, certainly, and it's not like Casper's going to bother him...

He stays right by Casper's side all the way until the dorm, where he lets them in (and quietly prays no one else is around right now), opening the door to his room and ushering the boy and bird (and... dragon soul) in. "Do you need anything to drink?" he asks, making sure Casper sits down on one of the beds before moving to fill a glass of water.