>"Would a weak host make them weak? And the opposite, I suppose?"
>"Ah. Well, the Sin would still have the use of all of its natural powers, but if it chose a host who was weak, an ordinary human, for example, then it would make a much less challenging foe. And as a consequence, be easier to exorcise, since we would only have to contend with the powers of the Sin, rather than whatever luckless being it had latched onto."
>"Which brings me back to the first point. There's more than one way to drive a Sin from a host. They're as much a spirit as they are flesh, so they can be exorcised much like a ghost could be. A priest or shrine maiden with sufficient power and skill can do it. And they are susceptable to multiple forms of magic, as well. I can think of many residents of Gensokyo with the knowledge and the power to pull a Sin out of someone. Even I can." she adds with a look at her other hand. "My divination ring may be the only method I have of detecting a Sin Spirit, but my abjuration ring can force a possessing spirit out of a living body. It isn't a painless way to do it, but it can work."
>"Didn't you say earlier that you had a lot of trouble separating Sakuya and Pride?" Momiji asks.
>"Those were very unusual circumstances. The odds of anything like that happening again are so remote, I wouldn't care to calculate them. Don't misunderstand, Momiji. Separating a Sin from a host is by no means easy, necessarily. But there are more ways than simply one to approach the problem."