I can answer your first by answering your second before it. [He tosses his roll up into the air. Sakuya might notice that it's considerably more slender than his is.] I thought you were one of the more violent ghosts here. They've broke in before - I sometimes miss cracks, or don't use enough tape...

[A sigh. He scruffs his hair and slips the roll back over his wrist.]

The tape keeps them out. You put it around the doors, the windows, the cracks on the walls... [He points to each in turn where, sure enough, they're all bound up.] It keeps the worst of them out.